PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM LABEL_REVISION_NOTE = " SwRI:BTCarcich 2014-10 Updated for Release 0001 delivery Corrected plu013.bsp to nh_plu017.bsp; was incorrect in previous delivery. SwRI:BTCarcich 2016-04 Updated for Release 0003 delivery SwRI:BTCarcich 2017-04-30 Updated for Release 0004 delivery - reaaranged KBO/Centaur section to make new SPKs easier to add SwRI:BLEnke 2020-04-01 Updated for Release 0005 delivery - reaaranged file lists for clarity. - included new pred files covering later timeframes. - added new recon kernels for KBOs, Pluto, and Arrokoth. SwRI:BLEnke 2023-01-13 Updated for Release 0007 delivery - added new comprehensive kernel for all KBOs. - added new predicted ephemeris based on OD157. " OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2020-06-30 NOTE = "SP-Kernel Information" END_OBJECT = TEXT END General information about SPICE SP-kernels ========================================== The purpose of the SP-kernel (SPK), which stands for S(pacecraft) and P(lanet) Kernel, is to allow ephemerides for any collection of solar system bodies, spacecraft or any other objects in 3D space to be combined under a common file format, and accessed by a common set of subroutines. SP Kernels provide the state of a target relative to its center of motion, where ``state'' implies Cartesian position and velocity at a requested epoch. The SPK format is supported by a collection of subroutines that are part of the SPICELIB library, the major component of the NAIF Toolkit. These subroutines can be integrated into user application programs. Information about obtaining the SPICE Toolkit is located in the "software" subdirectory of the main directory of this dataset. To use SP-kernels, a Leapseconds Kernel (LSK) is required. Also, to use SP-Kernels containing states defined relative to non-inertial or project-defined frames, a Frames Kernel (FK) and/or Planetary Constants Kernel (PcK) are required. Refer to the SPK Required Reading (spk.req) document provided with the Toolkit or available from the NAIF Node of the PDS, to get more information on how to access SP-kernel data. New Horizons SP-kernels Provided in This Directory ================================================= This directory contains the SPICE SP-Kernel files for the New Horizons spacecraft, New Horizons mission targets, (Jupiter and Pluto), and solar system bodies. All files are in IEEE big endian binary format and suitable for use on UNIX workstations and MACs. The following Reconstructed Spacecraft files are present in this directory: nh_recon_e2j_v1.bsp - Reconstructed trajectory data for the New Horizons spacecraft covering launch (2006-01-19) through 2007-03-19. nh_recon_j2sep07_prelimv1.bsp - Preliminary reconstructed trajectory data from 2007-03-19 to 2007-09-07 nh_recon_od077_v01.bsp nh_recon_od117_v01.bsp - Reconstructed ephemerides for the NH spacecraft along with Solar system bodies and Pluto system bodies that were solved for as part of the OD (Orbital Determination) solution. - These SPKs fill in between the formal reconstructed deliveries for the Jupiter and Pluto mission phases. - The NH trajectory has been extracted from the pre-DCO (Data CutOff) portion of reconstructed + predicted ephemeris solutions. - The time coverage of all bodies have been trimmed to the same limited extents as the spacecraft, so there is very little overlap between reconstructed SPKs in this data set, as loaded by the latest MK in extras/. nh_recon_pluto_od122_v01.bsp - This file is the primary SP-Kernel for the Pluto encounter. - P+90 (90 days after Pluto encounter) delivery of reconstructed Pluto approach, encounter and departure trajectory data from 2014-12-08 to 2015-09-27 - Contains ephemerides for the NH Spacecraft, the Pluto system bodies, and solar system bodies. - Superceded by nh_plu047_od122.bsp . nh_recon_arrokoth_od147_v01.bsp - This file is the primary SP-Kernel for the Arrokoth encounter. - Contains Kuiper Belt cruise data and Arrokoth approach, encounter, and departure trajectory data from 2015-09-27 to 2019-02-14. - Closest approach to Arrokoth occurred on 2019-01-01. - Contains ephemerides for the NH Spacecraft, the Pluto system bodies, and solar system bodies (including Arrokoth). The following Predicted Spacecraft files are present in this directory: nh_pred_alleph_od151.bsp - Combined predicted ephemeris for NH Spacecraft, Solar system bodies, and Arrokoth (2014 MU69, NAIF ID 2486958). - Predicted trajectory data for the New Horizons spacecraft covering 2019-02-07 to 2026-01-01. - Operational Orbital Determination (OD) solution ca. December, 2019. nh_pred_alleph_od157.bsp - Reconstructed and predicted ephemeris for NH Spacecraft, Solar system bodies, and Arrokoth (2014 MU69, NAIF ID 2486958) covering an interval from 2019-02-07 to 2028-02-01. - The predicted trajectory data for the New Horizons spacecraft covers from 2022-06-01 to 2028-02-01. - Operational Orbital Determination (OD) solution #157 is used prior to June, 2022. The following Natural Body/Mission Target Ephemeris files are present in this directory: nh_de433_od147.bsp - NH planetary ephemeris file, based on JPL version de433. jup260.bsp - Ephemeris data for Jupiter and its satellites nh_nep_ura_000.bsp - Ephemeris data for Neptune and Uranus nh_plu017.bsp - Ephemeris data for Pluto, Charon, Nix and Hydra (999, 901, 902, 903) nh_plu047_od122.bsp - Ephemeris data for Pluto, Charon, Nix, Hydra, Kerberos, and Styx (999, 901, 902, 903, 904, 905) - Replaces nh_recon_pluto_od122_v01.bsp as the official reconstructed SP-Kernel for the pre/post Pluto encounter interval. kbo_centaur_YYYYMMDD.bsp - Generic name for several files, described below - All versions are a group; files are complementary - Later versions do not replace earlier versions until the kbo_centaur_20230112.bsp (and any later) file, which contains the updated contents of all earlier kbo_centaur* files. - Science Operations Center (SOC)-generated ephemeris file - Generated to improve pipeline results. - Pipeline filenames may include "_horizons" prior to the date. - Ephemeris sources: JHU/APL astrometry group; JPL Horizons - Refer to SPK comment area for more information - kbo_centaur_20131129.bsp - 10199 Chariklo (1997 CU26) - 136108 Haumea (2003 EL61) - 136472 Makemake (2005 FY9) - kbo_centaur_20170422.bsp - 15810 ARAWN (1994 JR1) - 2010 JJ124 - 2060 CHIRON - 28978 IXION (2001 KX76) - ASTEROID 307261 (2002 MS4) - 50000 QUAOAR (2002 LM60) - ASTEROID 486958 (2014 MU69) - kbo_centaur_20200430.bsp - 1994 JR1 (15810 Arawn), supersedes earlier version - 2002 LM60 (50000 Quaoar), supersedes earlier version - 2002 MS4 (Asteroid 307261), supersedes earlier version - 2003 EL61 (136108 Haumea), supersedes earlier version - 2005 FY9 (136472 Makemake), supersedes earlier version - 2011 HF103 - 2011 HK103 - 2011 HZ102 - 2011 JA32 - 2011 JW31 - 2011 JY31 - 2014 OE394 - 2014 OJ394 - 2014 OS393 - 2014 PN70 - kbo_centaur_20221031.bsp - 2060 CHIRON, supersedes earlier version - 15810 ARAWN (1994 JR1), supersedes earlier version - 10199 Chariklo (1997 CU26), supersedes earlier version - 28978 IXION (2001 KX76), supersedes earlier version - 2002 MS4 (Asteroid 307261), supersedes earlier version - 2002 LM60 (50000 Quaoar), supersedes earlier versions, with more accurate ephemeris prior to January 1, 2024. - 2003 EL61 (136108 Haumea), supersedes earlier version - 2005 FY9 (136472 Makemake), supersedes earlier version - 2010 JJ124, supersedes earlier version - 2011 HF103, supersedes earlier version - 2011 HJ103 - 2011 HK103, supersedes earlier version - 2011 HZ102, supersedes earlier version - 2011 JA32, supersedes earlier version - 2011 JW31, supersedes earlier version - 2011 JX31 - 2011 JY31, supersedes earlier version - 2012 HE85 - 2012 HZ84 - 2013 LU35 - 2014 OE394, supersedes earlier version - 2014 OJ394, supersedes earlier version - 2014 OS393, supersedes earlier version - 2014 PN70, supersedes earlier version - 2020 KH42 - 2020 KO11 - 2020 KP11 - 2020 KR11 - 2020 KT11 - 2020 KU11 - B6600475, provisional name nh_extras.bsp - Science Operations Center (SOC)-generated ephemeris file - Generated to improve pipeline results. - Contains the following bodies: - CALLIRRHOE (SPICE ID 517) - KERBEROS (SPICE ID 904, formerly P4) - STYX (SPICE ID 905, formerly P5) - CALLIRRHOE ephemeris extracted from SPK jup300.bsp, which is based on a different DE, but this was close enough for pipeline needs. sb_2002jf56_2.bsp - Ephemeris data for asteroid 132524 APL (2002 JF56; 3127862) nh_2014_mu69_od147.bsp - Ephemeris data for Arrokoth, 2014 MU69 (2486958) The following Special Purpose files are present in this directory: nh_stars.bsp - Science Operations Center (SOC)-generated ephemeris file - Generated to improve pipeline results for stars. - Assigned Spice IDs range from 8888000 through 8888017. Refer to the documentation in pck/nh_stars_kbo_centaur_v003.tpc for more information about the ad hoc convention for stars adopted within the New Horizons project. The following Superceded Predicted Spacecraft files are included in this directory for historical purposes: nh_pred_od077.bsp - Predicted trajectory data for the New Horizons spacecraft covering 2007-03-19 to 2015-09-01. - Operational Orbital Determination (OD) solution ca. August, 2013 - While not a formal reconstruction product, it is based on tracking data through August, 2013. - Contains predict data through late 2015 - Refer to the partial OD077 Delivery Document included below - The name has been changed to meet PDS standards; the original name was nh_pred_20070319_20150901_od077.bsp. The following Superceded Natural Body/Mission Target Ephemeris files are included in this directory for historical purposes: de413.bsp de418.bsp - JPL planetary ephemeris files. - N.B. these kernels are still based on DE-413. So strictly speaking the user of these kernels should load kernels appropriate to the timeframe of their investigation. In practice it will likely not matter since the NH spacecraft is so far from any other object. sb_2014mu69_20150903_s6.bsp - Ephemeris data for Arrokoth (2014 MU69), the first Kuiper Belt Object (KBO) target of the extended mission for New Horizons. - Required for KBO-centered NH trajectory in nh_pred_alleph_od124.bsp below. - Superceded by nh_2014_mu69_od147.bsp . nh_pred_alleph_od124.bsp - Combined predicted ephemeris for NH Spacecraft, Solar system bodies, and Pluto system bodies. - Requires SPK sb_2014mu69_20150903_s6.bsp (below) for times after 2018-10-01. - Predicted trajectory data for the New Horizons spacecraft covering 2015-08-01 to 2019-03-01. - 2014 MU69 (Arrokoth) was the next target of the mission. SPICE ID of 2014 MU69 was 3713011 but has since been updated to 2486958. - Operational Orbital Determination (OD) solution ca. December, 2015 - Contains predict data through early 2019 - While not a formal reconstruction product, it is based on tracking data through 2015-12-01; however nh_recon_pluto_od122_v01.bsp should be used for Pluto encounter ephemerides. Kernel File Details =================== The most detailed description of the data in each SPK file is provided in metadata included inside the comment area of the file. This information can be viewed using the utility programs COMMNT and SPACIT included in the NAIF Toolkit.