NAIF Integer ID codes

Index Page NAIF Integer ID codes
## Table of Contents
       NAIF Integer ID codes
          Revisions
          Abstract
          Introduction
          Use of Code-to-Name/Name-to-Code Mappings from SPICE
             Use of an External Mapping Definition Kernel
             Masking
          NAIF Object ID numbers
             Barycenters
             Planets and Satellites
             Spacecraft
             Earth Orbiting Spacecraft.
             Comet Shoemaker Levy 9
             Comets
             Asteroids
             Ground Stations.
             Inertial and Non-inertial Reference Frames
          Spacecraft Clocks.
          Instruments
Top # NAIF Integer ID codes Top ## Revisions Last revised on 2009 APR 09 by E. D. Wright. This version of the document supersedes all previous versions. Top ## Abstract The NAIF IDS required reading lists all default ID-name mappings for the SPICE/CSPICE toolkits and a description of functionality of the corresponding software. Top ## Introduction SPICE system kernel files and subroutines refer to ephemeris objects, reference frames, and instruments by integer codes. An ephemeris object is any object that may have ephemeris or trajectory data such as a planet, natural satellite, tracking station, spacecraft, barycenter (the center of mass of a group of bodies), asteroid, or comet. Each body in the solar system is associated with an integer code for use with SPICE. The names and codes for many of these objects are listed below. Spacecraft ID codes are negative. These ID codes are usually derived from NASA control authority assignments. Instruments mounted on spacecraft also have ID codes. These are determined by multiplying the spacecraft ID by 1000 and subtracting the ordinal number of the instrument from the resulting product. Thus we can algorithmically recover the spacecraft code from an instrument code, and each instrument may have a unique code as long as there are 999 or fewer on a spacecraft. Caution: the NASA spacecraft ID control authority at GSFC is forced into reusing some IDs. This can affect the SPICE system for planetary or other spacecraft for which ID-name mappings are registered. (Here "registered" means a spacecraft for which use of the SPICE system is an actuality, or was contemplated.) Three cases exist. `1.` This document and SPICE ID-to-name mapping software include both past and current ID-name mappings for cases where both the old and the new ID assignments are for spacecraft registered within SPICE. The last mentioned ID-to-name mapping in this document is the one that will be used in SPICE software to effect ID-to-name translations within SPICE-based code. `2.` his document and SPICE ID-to-name mapping software contain only a mapping for the current use of a given ID if prior uses involved spacecraft never registered with SPICE (e.g. many non-planetary missions). `3.` This document and SPICE ID-to-name mapping software contain only a mapping for a prior use of a given ID if that prior use was for a spacecraft registered within SPICE and current use of the ID is for a spacecraft not registered within SPICE. For spacecraft the ID-to-name mapping may be a one-to-many mapping, allowing two or more names for a spacecraft to exist for a single numeric ID. The last mentioned ID-to-name mapping in this document is the one that will be used in SPICE software to effect ID-to-name translations within SPICE-based code. As the reader will see, ID codes now show the wear that results from an expanding system. As the SPICE system has expanded so has the number of objects that require identifying codes. Many of these objects do not fit neatly into the schemes originally envisioned as needing ID codes. As a result, the current system is a bit eclectic. Top ## Use of Code-to-Name/Name-to-Code Mappings from SPICE Software exists within the SPICE system that allows a user to easily map between an integer code and the object name that code represents or vice-versa. bodc2n_c performs the integer code to name mapping; input a code, the routine returns the corresponding name:
          bodc2n_c( code, lenout, &name, &found );

          Where ``lenout'' defines the maximum string length for name.
bodn2c_c performs the name to integer code mapping; input a name, the routine returns the corresponding ID code:
          bodn2c_c( name, &code, &found );
boddef_c performs a run-time assignment of a name/code mapping for later translation by bodc2n_c and bodn2c_c:
          boddef_c( name, code );
with `name' defining the character string associated with integer `code'. When using bodn2c_c, the `name' look-up is case insensitive, left justified, and space compressed (multiple spaces between words reduced to one) format. Spaces between words are significant.
          These strings are equivalent:
             'EARTH', '  Earth ', 'earth  '
          As well as:
             'Solar System Barycenter', 'SOLAR  System  barycenter'
          but
             'SolarSystemBarycenter'
          is not due to the lack of spaces between words.
The boolean `found' has value true if a mapping look-up succeeded, false otherwise. Top ### Use of an External Mapping Definition Kernel If necessary, a user may elect to load additional name-ID pairs for access by SPICE software. These pairs may be new definitions, or they may override the default mapping assignment. Create new name-ID pairs With a text kernel such as
          \begintext

          Define an additional set of body, ID code mappings.

          \begindata

          NAIF_BODY_CODE  += ( 22, 23, 24, 25 )

          NAIF_BODY_NAME  += ( 'LARRY', 'MOE', 'CURLEY', 'SHEMP' )
Load the kernel as usual with a furnsh_c call. The names defined in NAIF_BODY_NAME map to the corresponding index of NAIF_BODY_CODE, i.e. LARRY->22, MOE->23, etc, and the IDs in NAIF_BODY_CODE map to the corresponding index of NAIF_BODY_NAME. If an external ID kernel is used, be aware of several rules: `1.` All ID codes MUST be listed in the kernel variable NAIF_BODY_CODE, and all names MUST be listed in the kernel variable NAIF_BODY_NAME. `2.` The CSPICE system can access 2000 external name-ID pairs defined via a text kernel. CSPICE signals an error when the number of assignments exceeds 2000. `3.` You may assign an ID code to multiple names. A bodc2n_c call returns the last name assigned; a last in, first out situation. Since NAIF_BODY_CODE and NAIF_BODY_NAME are kernel variables, use of the "+=" notation in the previous example means the values are appended to the mapping set present in memory. For example, the block:
          \begindata

          NAIF_BODY_CODE  += ( 170100, 170101 )

          NAIF_BODY_NAME  += ( 'Enterprise', 'Enterprise-A' )
appends the two pairings to the existent set of mappings. CAUTION: Use of the assignment operator, ''='', instead of the append operator, ''+='', destroys any previous name-ID definitions for a kernel variable. Top ### Masking As of release N53, the SPICE Toolkit provides the user the functionality to override or mask any name/ID mapping. Use a boddef_c call or define NAIF_BODY_NAME, NAIF_BODY_CODE assignments from a text kernel to perform a masking operations. Simplistically, the mask functionality provides the user the option of mapping multiple names to the same code. Name/ID assignments function within a precedence hierarchy, so a lower precedence operation cannot affect previous assignments created by an operation of higher precedence. Kernel pool definitions have the highest precedence, boddef_c definitions next, and finally the default definitions. The order of assignments is significant.
                                        Highest precedence

                                       (1) Kernel pool final assignment

                                 (2) Kernel pool initial assignment

                           (3) A ``boddef'' call final assignment

                     (4) A ``boddef'' call initial assignment

               (5) The default mappings final assignment

         (6) The default mappings initial assignment

         Lowest precedence
Example 1: Assign the name 'x' (lower case) to ID 1000 with boddef_c:
          boddef_c( "x", 1000 );
A call to bodc2n_c with 1000 as the input ID:
          bodc2n_c( 1000, lenout, &name, &found );
returns the name 'x'. The bodn2c_c calls:
          bodn2c_c( "x", &code, &found );
          bodn2c_c( "X", &code, &found );
both return the ID as 1000. Note the case insensitivity of the name input. Now a demo of simple masking functionality. Assign a new name to ID 1000:
          boddef_c( "Y", 1000 );
so the bodn2c_c call
          bodn2c_c( "Y", &code, &found );
returns an ID of 1000. In a similar manner, the bodc2n_c call:
          bodc2n_c( 1000, lenout, &name, &found );
returns the name 'Y'. Still, the code assigned to 'x' persists within CSPICE as the call:
          bodn2c_c( "x", &code, &found );
also returns ID 1000. If we reassign 'Y' to a different ID:
          boddef_c( "Y", 1001 );
then make a bodc2n_c call with 1000 as the input ID:
          bodc2n_c( 1000, lenout, &name, &found );
the routine returns the name 'x'. We assigned an ID to 'x', masked it with another name, then demasked it by reassigning the masking name, 'Y'. If a boddef_c assigns an existing name to an existing code, that assignment takes precedence. Example 2:
          bodn2c_c( "THEBE", &code, &found );
returns a code value 514. Likewise
          bodc2n_c( 514, &name, &found );
returns a name of 'THEBE'. Yet the name '1979J2' also maps to code 514, but with lower precedence. The boddef_c call:
          boddef_c( "1979J2", 514 );
places the '1979J2' <-> 514 mapping at the top of the precedence list, so:
          bodc2n_c( 514, &name, &found );
returns the name '1979J2'. Note, 'THEBE' still resolves to 514. In those cases where a kernel pool assignment overrides a boddef_c, the boddef_c mapping 'reappears' when an unload_c, kclear_c or clpool_c call clears the kernel pool mappings. Example 3: Execute a boddef_c call:
          boddef_c( "vehicle2", -1010 );
A bodc2n_c call:
          bodc2n_c( -1010, lenout, &name, &found );
returns the name 'vehicle2' as expected. If you then load the name/ID kernel body.ker:
          \begindata

          NAIF_BODY_NAME = ( 'vehicle1' )
          NAIF_BODY_CODE = ( -1010      )

          \begintext
with furnsh_c:
          furnsh_c( "body.ker" );
the bodc2n_c call:
          bodc2n_c( -1010, lenout, &name, &found );
returns 'vehicle1' since the kernel assignment take precedence over the boddef_c assignment. The name/ID map state:
           -1010    -> vehicle1
           vehicle1 -> -1010
           vehicle2 -> -1010
Now, unload the body kernel:
          unload_c( "body.ker" );
The boddef_c assignment resumes highest precedence.
          bodc2n_c( -1010, lenout, &name, &found );
The call returns 'vehicle2' for the name. CAUTION: Please understand a clpool_c or kclear_c call deletes all mapping assignments defined through the kernel pool. No similar clear functionality exists to clear boddef_c. boddef_c assignments persist unless explicitly overridden. Top ## NAIF Object ID numbers In theory, a unique integer can be assigned to each body in the solar system, including interplanetary spacecraft. SPICE uses integer codes instead of names to refer to ephemeris bodies for three reasons. `1.` Space `` Integer codes are smaller than alphanumeric names. `2.` Uniqueness `` The names of some satellites conflict with the names of some asteroids and comets. Also, some satellites are commonly referred to by names other than those approved by the IAU. `3.` Context `` The type of a body (barycenter, planet, satellite, comet, asteroid, or spacecraft) and the system to which it belongs (Earth, Mars, Jupiter, Saturn, Uranus, Neptune, or Pluto) can be recovered algorithmically from the integer code assigned to a body. This is not generally true for names. Top ### Barycenters The smallest positive codes are reserved for the Sun and planetary barycenters:
          NAIF ID     NAME
          ________    ____________________
          0           'SSB'
          0           'SOLAR SYSTEM BARYCENTER'
          1           'MERCURY BARYCENTER'
          2           'VENUS BARYCENTER'
          3           'EMB'
          3           'EARTH MOON BARYCENTER'
          3           'EARTH-MOON BARYCENTER'
          3           'EARTH BARYCENTER'
          4           'MARS BARYCENTER'
          5           'JUPITER BARYCENTER'
          6           'SATURN BARYCENTER'
          7           'URANUS BARYCENTER'
          8           'NEPTUNE BARYCENTER'
          9           'PLUTO BARYCENTER'
          10          'SUN'
For those planets without moons, Mercury and Venus, the barycenter location coincides with the body center of mass. However do not infer you may interchange use of the planet barycenter ID and the planet ID. A barycenter has no radii, right ascension/declination of the pole axis, etc. Use the planet ID when referring to a planet or any property of that planet. Top ### Planets and Satellites Planets have ID codes of the form P99, where P is 1, ..., 9 (the planetary ID); a planet is always considered to be the 99th satellite of its own barycenter, e.g. Jupiter is body number 599. Natural satellites have ID codes of the form
               PNN, where

                      P  is  1, ..., 9
                  and NN is 01, ... 98
or
               PXNNN, where

                      P   is    1, ...,  9,
                      X   is    0  or    5,
                  and NNN is  001, ... 999

            Codes with X = 5 are provisional.
e.g. Ananke, the 12th satellite of Jupiter (JXII), is body number 512. (Note the fragments of comet Shoemaker Levy 9 are exceptions to this rule.)
          NAIF ID     NAME                    IAU NUMBER
          ________    ____________________    __________
          199         'MERCURY'
          299         'VENUS'
          399         'EARTH'
          301         'MOON'
          499         'MARS'
          401         'PHOBOS'                MI
          402         'DEIMOS'                MII
          599         'JUPITER'
          501         'IO'                    JI
          502         'EUROPA'                JII
          503         'GANYMEDE'              JIII
          504         'CALLISTO'              JIV
          505         'AMALTHEA'              JV
          506         'HIMALIA'               JVI
          507         'ELARA'                 JVII
          508         'PASIPHAE'              JVIII
          509         'SINOPE'                JIX
          510         'LYSITHEA'              JX
          511         'CARME'                 JXI
          512         'ANANKE'                JXII
          513         'LEDA'                  JXIII
          514         'THEBE'                 JXIV
          515         'ADRASTEA'              JXV
          516         'METIS'                 JXVI
          517         'CALLIRRHOE'            JXVII
          518         'THEMISTO'              JXVIII
          519         'MAGACLITE'             JXIX
          520         'TAYGETE'               JXX
          521         'CHALDENE'              JXXI
          522         'HARPALYKE'             JXXII
          523         'KALYKE'                JXXIII
          524         'IOCASTE'               JXXIV
          525         'ERINOME'               JXXV
          526         'ISONOE'                JXXVI
          527         'PRAXIDIKE'             JXXVII
          528         'AUTONOE'               JXXVIII
          529         'THYONE'                JXXIX
          530         'HERMIPPE'              JXXX
          531         'AITNE'                 JXXXI
          532         'EURYDOME'              JXXXII
          533         'EUANTHE'               JXXXIII
          534         'EUPORIE'               JXXXIV
          535         'ORTHOSIE'              JXXXV
          536         'SPONDE'                JXXXVI
          537         'KALE'                  JXXXVII
          538         'PASITHEE'              JXXXVIII
          539         'HEGEMONE'
          540         'MNEME'
          541         'AOEDE'
          542         'THELXINOE'
          543         'ARCHE'
          544         'KALLICHORE'
          545         'HELIKE'
          546         'CARPO'
          547         'EUKELADE'
          548         'CYLLENE'
          549         'KORE'

          699         'SATURN'
          601         'MIMAS'                 SI
          602         'ENCELADUS'             SII
          603         'TETHYS'                SIII
          604         'DIONE'                 SIV
          605         'RHEA'                  SV
          606         'TITAN'                 SVI
          607         'HYPERION'              SVII
          608         'IAPETUS'               SVIII
          609         'PHOEBE'                SIX
          610         'JANUS'                 SX
          611         'EPIMETHEUS'            SXI
          612         'HELENE'                SXII
          613         'TELESTO'               SXIII
          614         'CALYPSO'               SXIV
          615         'ATLAS'                 SXV
          616         'PROMETHEUS'            SXVI
          617         'PANDORA'               SXVII
          618         'PAN'                   SXVIII
          619         'YMIR'                  SXIX
          620         'PAALIAQ'               SXX
          621         'TARVOS'                SXXI
          622         'IJIRAQ'                SXXII
          623         'SUTTUNGR'              SXXIII
          624         'KIVIUQ'                SXXIV
          625         'MUNDILFARI'            SXXV
          626         'ALBIORIX'              SXXVI
          627         'SKATHI'                SXXVII
          628         'ERRIAPUS'              SXXVIII
          629         'SIARNAQ'               SXXIX
          630         'THRYMR'                SXXX
          631         'NARVI'                 SXXXI
          632         'METHONE'               SXXXII
          633         'PALLENE'               SXXXIII
          634         'POLYDEUCES'            SXXXIV
          635         'DAPHNIS'
          636         'AEGIR'
          637         'BEBHIONN'
          638         'BERGELMIR'
          639         'BESTLA'
          640         'FARBAUTI'
          641         'FENRIR'
          642         'FORNJOT'
          643         'HATI'
          644         'HYROKKIN'
          645         'KARI'
          646         'LOGE'
          647         'SKOLL'
          648         'SURTUR'
          649         'ANTHE'
          650         'JARNSAXA'
          651         'GREIP'
          652         'TARQEQ'

          799         'URANUS'
          701         'ARIEL'                 UI
          702         'UMBRIEL'               UII
          703         'TITANIA'               UIII
          704         'OBERON'                UIV
          705         'MIRANDA'               UV
          706         'CORDELIA'              UVI
          707         'OPHELIA'               UVII
          708         'BIANCA'                UVIII
          709         'CRESSIDA'              UIX
          710         'DESDEMONA'             UX
          711         'JULIET'                UXI
          712         'PORTIA'                UXII
          713         'ROSALIND'              UXIII
          714         'BELINDA'               UXIV
          715         'PUCK'                  UXV
          716         'CALIBAN'               UXVI
          717         'SYCORAX'               UXVII
          718         'PROSPERO'              UXVIII
          719         'SETEBOS'               UXIX
          720         'STEPHANO'              UXX
          721         'TRINCULO'              UXXI
          722         'FRANCISCO'
          723         'MARGARET'
          724         'FERDINAND'
          725         'PERDITA'
          726         'MAB'
          727         'CUPID'
          899         'NEPTUNE'
          801         'TRITON'                NI
          802         'NEREID'                NII
          803         'NAIAD'                 NIII
          804         'THALASSA'              NIV
          805         'DESPINA'               NV
          806         'GALATEA'               NVI
          807         'LARISSA'               NVII
          808         'PROTEUS'               NVIII
          809         'HALIMEDE'
          810         'PSAMATHE'
          811         'SAO'
          812         'LAOMEDEIA'
          813         'NESO'
          999         'PLUTO'
          901         'CHARON'                PI
          902         'NIX'
          903         'HYDRA'
Top ### Spacecraft THE SPICE convention uses negative integers as spacecraft ID codes. The code assigned to interplanetary spacecraft is normally the negative of the code assigned to the same spacecraft by JPL's Deep Space Network (DSN) as determined the NASA control authority at Goddard Space Flight Center. The current SPICE vehicle code assignments:
          NAIF ID     NAME
          ________    ____________________
          -1          'GEOTAIL'
          -5          'PLC'
          -5          'PLANET-C'
          -6          'P6'
          -6          'PIONEER-6'
          -7          'P7'
          -7          'PIONEER-7'
          -8          'WIND'
          -12         'VENUS ORBITER'
          -12         'P12'
          -12         'PIONEER 12'
          -13         'POLAR'
          -18         'MGN'
          -18         'MAGELLAN'
          -18         'LCROSS'
          -20         'P8'
          -20         'PIONEER-8'
          -21         'SOHO'
          -23         'P10'
          -23         'PIONEER-10'
          -24         'P11'
          -24         'PIONEER-11'
          -25         'LP'
          -25         'LUNAR PROSPECTOR'
          -27         'VK1'
          -27         'VIKING 1 ORBITER'
          -29         'STARDUST'
          -29         'SDU'
          -29         'NEXT'
          -30         'VK2'
          -30         'VIKING 2 ORBITER'
          -30         'DS-1'
          -31         'VG1'
          -31         'VOYAGER 1'
          -32         'VG2'
          -32         'VOYAGER 2'
          -40         'CLEMENTINE'
          -41         'MEX'
          -41         'MARS EXPRESS'
          -44         'BEAGLE2'
          -44         'BEAGLE 2'
          -46         'MS-T5'
          -46         'SAKIGAKE'
          -47         'PLANET-A'
          -47         'SUISEI'
          -47         'GNS'
          -47         'GENESIS'
          -48         'HUBBLE SPACE TELESCOPE'
          -48         'HST'
          -53         'MARS PATHFINDER'
          -53         'MPF'
          -53         'MARS ODYSSEY'
          -53         'MARS SURVEYOR 01 ORBITER'
          -55         'ULYSSES'
          -58         'VSOP'
          -58         'HALCA'
          -59         'RADIOASTRON'
          -61         'JUNO'
          -76         'MSL'
          -76         'MARS SCIENCE LABORATORY'
          -66         'VEGA 1'
          -67         'VEGA 2'
          -68         'MMO'
          -68         'MERCURY MAGNETOSPHERIC ORBITER'
          -69         'MPO'
          -69         'MERCURY PLANETARY ORBITER'
          -70         'DEEP IMPACT IMPACTOR SPACECRAFT'
          -74         'MRO'
          -74         'MARS RECON ORBITER'
          -77         'GLL'
          -77         'GALILEO ORBITER'
          -78         'GIOTTO'
          -79         'SPITZER'
          -79         'SPACE INFRARED TELESCOPE FACILITY'
          -79         'SIRTF'
          -81         'CASSINI ITL'
          -82         'CAS'
          -82         'CASSINI'
          -84         'PHOENIX'
          -85         'LRO'
          -85         'LUNAR RECON ORBITER'
          -85         'LUNAR RECONNAISSANCE ORBITER'
          -86         'CH1'
          -86         'CHANDRAYAAN-1'
          -90         'CASSINI SIMULATION'
          -93         'NEAR EARTH ASTEROID RENDEZVOUS'
          -93         'NEAR'
          -94         'MO'
          -94         'MARS OBSERVER'
          -94         'MGS'
          -94         'MARS GLOBAL SURVEYOR'
          -95         'MGS SIMULATION'
          -97         'TOPEX/POSEIDON'
          -98         'NEW HORIZONS'
          -107        'TROPICAL RAINFALL MEASURING MISSION'
          -107        'TRMM'
          -112        'ICE'
          -116        'MARS POLAR LANDER'
          -116        'MPL'
          -127        'MARS CLIMATE ORBITER'
          -127        'MCO'
          -130        'MUSES-C'
          -130        'HAYABUSA'
          -131        'SELENE'
          -131        'KAGUYA'
          -135        'DRTS-W'
          -140        'EPOCH'
          -140        'DIXI'
          -140        'EPOXI'
          -140        'DEEP IMPACT FLYBY SPACECRAFT'
          -142        'TERRA'
          -142        'EOS-AM1'
          -146        'LUNAR-A'
          -150        'CASSINI PROBE'
          -150        'HUYGENS PROBE'
          -150        'CASP'
          -151        'AXAF'
          -151        'CHANDRA'
          -154        'AQUA'
          -159        'EUROPA ORBITER'
          -164        'YOHKOH'
          -164        'SOLAR-A'
          -165        'MAP'
          -166        'IMAGE'
          -178        'PLANET-B'
          -178        'NOZOMI'
          -183        'CLUSTER 1'
          -185        'CLUSTER 2'
          -187        'SOLAR PROBE'
          -188        'MUSES-B'
          -190        'SIM'
          -194        'CLUSTER 3'
          -196        'CLUSTER 4'
          -198        'INTEGRAL'
          -200        'CONTOUR'
          -203        'DAWN'
          -212        'STV51'
          -213        'STV52'
          -214        'STV53'
          -226        'ROSETTA'
          -227        'KEPLER'
          -228        'GLL PROBE'
          -228        'GALILEO PROBE'
          -234        'STEREO AHEAD'
          -235        'STEREO BEHIND'
          -236        'MESSENGER'
          -238        'SMART1'
          -238        'SM1'
          -238        'S1'
          -238        'SMART-1'
          -248        'VEX'
          -248        'VENUS EXPRESS'
          -253        'OPPORTUNITY'
          -253        'MER-1'
          -254        'SPIRIT'
          -254        'MER-2'
          -486        'HERSCHEL'
          -489        'PLANCK'
          -500        'RSAT'
          -500        'SELENE Relay Satellite'
          -500        'SELENE Rstar'
          -500        'Rstar'
          -502        'VSAT'
          -502        'SELENE VLBI Radio Satellite'
          -502        'SELENE VRAD Satellite'
          -502        'SELENE Vstar'
          -502        'Vstar'
          -550        'MARS-96'
          -550        'M96'
          -550        'MARS 96'
          -550        'MARS96'
Top ### Earth Orbiting Spacecraft. If an Earth orbiting spacecraft lacks a DSN identification code, the NAIF ID is derived from the tracking ID assigned to it by the US Space Command via:
          NAIF ID = -100000 - US Space Command code
For example US Space Command assigned the code 15427 to the NOAA 9 spacecraft. This code corresponds to the NAIF ID -115427. Top ### Comet Shoemaker Levy 9 In July, 1992 Comet Shoemaker Levy 9 passed close enough to the planet Jupiter that it was torn apart by gravitational tidal forces. As a result it became a satellite of Jupiter. However, in July 1994 the remnants of Shoemaker Levy 9 collided with Jupiter. Consequently, the fragments existed as satellites of Jupiter for only two years. These fragments were given the NAIF ID's listed below. Unfortunately, there have been two competing conventions selected for identifying the fragments of the comet. In one convention the fragments have been assigned numbers 1 through 21. In the second convention the fragments have been assigned letters A through W (with I and O unused). To add to the confusion, the ordering for the numbers is reversed from the letter ordering. Fragment 21 corresponds to letter A; fragment 20 to letter B and so on. Fragment A was the first of the fragments to collide with Jupiter; fragment W was the last to collide with Jupiter. The original fragments P and Q subdivided further creating the fragments P2 and Q1.
          NAIF ID     NAME                    SHOEMAKER-LEVY 9 FRAGMENT
          ________    ____________________    _________________________
          50000001    'SHOEMAKER-LEVY 9-W'    FRAGMENT 1
          50000002    'SHOEMAKER-LEVY 9-V'    FRAGMENT 2
          50000003    'SHOEMAKER-LEVY 9-U'    FRAGMENT 3
          50000004    'SHOEMAKER-LEVY 9-T'    FRAGMENT 4
          50000005    'SHOEMAKER-LEVY 9-S'    FRAGMENT 5
          50000006    'SHOEMAKER-LEVY 9-R'    FRAGMENT 6
          50000007    'SHOEMAKER-LEVY 9-Q'    FRAGMENT 7
          50000008    'SHOEMAKER-LEVY 9-P'    FRAGMENT 8
          50000009    'SHOEMAKER-LEVY 9-N'    FRAGMENT 9
          50000010    'SHOEMAKER-LEVY 9-M'    FRAGMENT 10
          50000011    'SHOEMAKER-LEVY 9-L'    FRAGMENT 11
          50000012    'SHOEMAKER-LEVY 9-K'    FRAGMENT 12
          50000013    'SHOEMAKER-LEVY 9-J'    FRAGMENT 13
          50000014    'SHOEMAKER-LEVY 9-H'    FRAGMENT 14
          50000015    'SHOEMAKER-LEVY 9-G'    FRAGMENT 15
          50000016    'SHOEMAKER-LEVY 9-F'    FRAGMENT 16
          50000017    'SHOEMAKER-LEVY 9-E'    FRAGMENT 17
          50000018    'SHOEMAKER-LEVY 9-D'    FRAGMENT 18
          50000019    'SHOEMAKER-LEVY 9-C'    FRAGMENT 19
          50000020    'SHOEMAKER-LEVY 9-B'    FRAGMENT 20
          50000021    'SHOEMAKER-LEVY 9-A'    FRAGMENT 21
          50000022    'SHOEMAKER-LEVY 9-Q1'   FRAGMENT 7A
          50000023    'SHOEMAKER-LEVY 9-P2'   FRAGMENT 8B
Top ### Comets ID codes for periodic comets begin at 1000001 and continue in sequence indefinitely. (The current numbering scheme assumes that no need for more than one million comet ID codes.) The current list of periodic comets and their ID codes are given below. As new periodic comets are discovered, this list will be expanded. The ID codes for a new comet will be formed by adding one to the last comet ID in the current SPICE list. As you can see the first portion of the list is in alphabetical order. However, this pattern breaks down at ID code 1000112. This reflects the fact that new periodic comets were discovered after identification of the first 111. If you don't find the comet you are interested in the first 111 comets listed look at the last 28 to see if you can find the comet of interest. Finally, note that Comet Shoemaker Levy 9 is included in this list (ID code 1000130) though it is no longer a comet, periodic or otherwise. It was an identified periodic comet prior to its breakup, which accounts for its inclusion in this list.
          NAIF ID     NAME
          ________    ____________________
          1000001     'AREND'
          1000002     'AREND-RIGAUX'
          1000003     'ASHBROOK-JACKSON'
          1000004     'BOETHIN'
          1000005     'BORRELLY'
          1000006     'BOWELL-SKIFF'
          1000007     'BRADFIELD'
          1000008     'BROOKS 2'
          1000009     'BRORSEN-METCALF'
          1000010     'BUS'
          1000011     'CHERNYKH'
          1000012     '67P/CHURYUMOV-GERASIMENKO (1969 R1)'
          1000012     'CHURYUMOV-GERASIMENKO'
          1000013     'CIFFREO'
          1000014     'CLARK'
          1000015     'COMAS SOLA'
          1000016     'CROMMELIN'
          1000017     'D''ARREST'
          1000018     'DANIEL'
          1000019     'DE VICO-SWIFT'
          1000020     'DENNING-FUJIKAWA'
          1000021     'DU TOIT 1'
          1000022     'DU TOIT-HARTLEY'
          1000023     'DUTOIT-NEUJMIN-DELPORTE'
          1000024     'DUBIAGO'
          1000025     'ENCKE'
          1000026     'FAYE'
          1000027     'FINLAY'
          1000028     'FORBES'
          1000029     'GEHRELS 1'
          1000030     'GEHRELS 2'
          1000031     'GEHRELS 3'
          1000032     'GIACOBINI-ZINNER'
          1000033     'GICLAS'
          1000034     'GRIGG-SKJELLERUP'
          1000035     'GUNN'
          1000036     'HALLEY'
          1000037     'HANEDA-CAMPOS'
          1000038     'HARRINGTON'
          1000039     'HARRINGTON-ABELL'
          1000040     'HARTLEY 1'
          1000041     'HARTLEY 2'
          1000042     'HARTLEY-IRAS'
          1000043     'HERSCHEL-RIGOLLET'
          1000044     'HOLMES'
          1000045     'HONDA-MRKOS-PAJDUSAKOVA'
          1000046     'HOWELL'
          1000047     'IRAS'
          1000048     'JACKSON-NEUJMIN'
          1000049     'JOHNSON'
          1000050     'KEARNS-KWEE'
          1000051     'KLEMOLA'
          1000052     'KOHOUTEK'
          1000053     'KOJIMA'
          1000054     'KOPFF'
          1000055     'KOWAL 1'
          1000056     'KOWAL 2'
          1000057     'KOWAL-MRKOS'
          1000058     'KOWAL-VAVROVA'
          1000059     'LONGMORE'
          1000060     'LOVAS 1'
          1000061     'MACHHOLZ'
          1000062     'MAURY'
          1000063     'NEUJMIN 1'
          1000064     'NEUJMIN 2'
          1000065     'NEUJMIN 3'
          1000066     'OLBERS'
          1000067     'PETERS-HARTLEY'
          1000068     'PONS-BROOKS'
          1000069     'PONS-WINNECKE'
          1000070     'REINMUTH 1'
          1000071     'REINMUTH 2'
          1000072     'RUSSELL 1'
          1000073     'RUSSELL 2'
          1000074     'RUSSELL 3'
          1000075     'RUSSELL 4'
          1000076     'SANGUIN'
          1000077     'SCHAUMASSE'
          1000078     'SCHUSTER'
          1000079     'SCHWASSMANN-WACHMANN 1'
          1000080     'SCHWASSMANN-WACHMANN 2'
          1000081     'SCHWASSMANN-WACHMANN 3'
          1000082     'SHAJN-SCHALDACH'
          1000083     'SHOEMAKER 1'
          1000084     'SHOEMAKER 2'
          1000085     'SHOEMAKER 3'
          1000086     'SINGER-BREWSTER'
          1000087     'SLAUGHTER-BURNHAM'
          1000088     'SMIRNOVA-CHERNYKH'
          1000089     'STEPHAN-OTERMA'
          1000090     'SWIFT-GEHRELS'
          1000091     'TAKAMIZAWA'
          1000092     'TAYLOR'
          1000093     'TEMPEL 1'
          1000094     'TEMPEL 2'
          1000095     'TEMPEL-TUTTLE'
          1000096     'TRITTON'
          1000097     'TSUCHINSHAN 1'
          1000098     'TSUCHINSHAN 2'
          1000099     'TUTTLE'
          1000100     'TUTTLE-GIACOBINI-KRESAK'
          1000101     'VAISALA 1'
          1000102     'VAN BIESBROECK'
          1000103     'VAN HOUTEN'
          1000104     'WEST-KOHOUTEK-IKEMURA'
          1000105     'WHIPPLE'
          1000106     'WILD 1'
          1000107     'WILD 2'
          1000108     'WILD 3'
          1000109     'WIRTANEN'
          1000110     'WOLF'
          1000111     'WOLF-HARRINGTON'
          1000112     'LOVAS 2'
          1000113     'URATA-NIIJIMA'
          1000114     'WISEMAN-SKIFF'
          1000115     'HELIN'
          1000116     'MUELLER'
          1000117     'SHOEMAKER-HOLT 1'
          1000118     'HELIN-ROMAN-CROCKETT'
          1000119     'HARTLEY 3'
          1000120     'PARKER-HARTLEY'
          1000121     'HELIN-ROMAN-ALU 1'
          1000122     'WILD 4'
          1000123     'MUELLER 2'
          1000124     'MUELLER 3'
          1000125     'SHOEMAKER-LEVY 1'
          1000126     'SHOEMAKER-LEVY 2'
          1000127     'HOLT-OLMSTEAD'
          1000128     'METCALF-BREWINGTON'
          1000129     'LEVY'
          1000130     'SHOEMAKER-LEVY 9'
          1000131     'HYAKUTAKE'
          1000132     'HALE-BOPP'
Top ### Asteroids ID codes for numbered asteroids listed in the JPL Asteroid and Comet Catalog [166.0] are determined via the algorithm:
          NAIF ID code = 2000000 + JPL Asteroid number
For example, asteroid Yeomans (2956) has NAIF ID number 2002956. The complete list of asteroids is far too numerous (over 4000 identified asteroids) to include in this document. However, we include the NAIF ID codes for the most commonly requested asteroids:
          NAIF ID     NAME
          ________    ____________________
          9511010     'GASPRA'
          2431010     'IDA'
          2431011     'DACTYL'
          2000001     'CERES'
          2000004     'VESTA'
          2000216     'KLEOPATRA'
          2000433     'EROS'
          2000253     'MATHILDE'
          2002867     'STEINS'
          2009969     '1992KD'
          2009969     'BRAILLE'
          2004015     'WILSON-HARRINGTON'
          2025143     'ITOKAWA'
There are three exceptions to the rule---asteroids Gaspra, Ida and Ida's satellite Dactyl, visited by the Galileo spacecraft. The ID codes for these asteroids were determined using an older numbering convention now abandoned by the SPICE system. The orbit of Dactyl has not been completely determined at the time of this writing. However, in anticipation of this determination, Dactyl has been assigned the NAIF ID code 2431011. Note that if more than 431010 asteroids are ever identified and cataloged there will arise a conflict between the new numbering system and the ID code for Ida. At that time NAIF (or its successor) will need to add another exception to the asteroid numbering system. Top ### Ground Stations. The SPICE system accommodates ephemerides for tracking stations and landed spacecraft. Currently five earth tracking station sites are supported: Goldstone, Canberra, Madrid, Usuda, and Parkes. Note that these refer only to the general geographic location of the various tracking sites. IDs for the individual antennas at a given site are assigned when more than one antenna is present. The following NAIF ID codes are assigned.
          NAIF ID     NAME
          ________    ____________________
          398989      'NOTO'
          398990      'NEW NORCIA'
          399001      'GOLDSTONE'
          399002      'CANBERRA'
          399003      'MADRID'
          399004      'USUDA'
          399005      'DSS-05'
          399005      'PARKES'
          399012      'DSS-12'
          399013      'DSS-13'
          399014      'DSS-14'
          399015      'DSS-15'
          399016      'DSS-16'
          399017      'DSS-17'
          399023      'DSS-23'
          399024      'DSS-24'
          399025      'DSS-25'
          399026      'DSS-26'
          399027      'DSS-27'
          399028      'DSS-28'
          399033      'DSS-33'
          399034      'DSS-34'
          399042      'DSS-42'
          399043      'DSS-43'
          399045      'DSS-45'
          399046      'DSS-46'
          399049      'DSS-49'
          399053      'DSS-53'
          399054      'DSS-54'
          399055      'DSS-55'
          399061      'DSS-61'
          399063      'DSS-63'
          399064      'DSS-64'
          399065      'DSS-65'
          399066      'DSS-66'
Top ### Inertial and Non-inertial Reference Frames Please refer to the Frames Required Reading document, frames.req, for detailed information on the implementation of reference frames in the SPICE system. Top ## Spacecraft Clocks. The ID code used to identify the on-board clock of a spacecraft (spacecraft clock or SCLK) in SPICE software is the same as the ID code of the spacecraft. This convention assumes that only one clock is used on-board a spacecraft to control all observations and spacecraft functions. However, missions are envisioned in which instruments may have clocks not tightly coupled to the primary spacecraft control clock. When this situation occurs, the correspondence between clocks and spacecraft will be broken and more than one clock ID code will be associated with a mission. It is anticipated that the I-kernel will contain the information needed to associate the appropriate clock with a particular instrument. Top ## Instruments With regards to a spacecraft, the term ``instrument'' means a science instrument or vehicle structure to which the concept of orientation is applicable. NAIF, in cooperation with the science teams from each flight project, assigns ID codes to a vehicle instrument. The instruments are simply enumerated via some project convention to arrive at an ''instrument number.'' The NAIF ID code for an instrument derives from the instrument number via the function:
          NAIF instrument code = (s/c code)*(1000) - instrument number
This allows for 1000 instrument assignments on board a spacecraft. An application of the instrument ID concept applied to the Voyager 2 vehicle (ID -32): `` -32000 -> Instrument Scan Platform `` -32001 -> ISSNA (Imaging science narrow angle camera) `` -32002 -> ISSWA (Imaging science wide angle camera) `` -32003 -> PPS (Photopolarimeter) `` -32004 -> UVSAG (Ultraviolet Spectrometer, Airglow port) `` -32005 -> UVSOCC (Ultraviolet Spectrometer, Occultation port) `` -32006 -> IRIS (Infrared Interferometer Spectrometer and Radiometer) Use SPICE text kernels (usually Instrument or Frames kernels) to define the instrument name/ID mappings.