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Planetary Satellite Ephemerides

The following tables list the current JPL planetary satellite ephemeris used for each planetary satellite. These ephemerides are used by Horizons to provide high-precision ephemerides for the planetary satellites. Tables are grouped by planet (and category of satellite for planets with many satellites).

Martian Satellites

Satellite Code Ephemeris Ref.
Phobos 401 MAR097 11
Deimos 402 MAR097 11

Jovian Regular Satellites

Satellite Code Ephemeris Ref.
Io 501 JUP365 26
Europa 502 JUP365 26
Ganymede 503 JUP365 26
Callisto 504 JUP365 26
Amalthea 505 JUP365 26
Thebe 514 JUP365 26
Adrastea 515 JUP365 26
Metis 516 JUP365 26

Jovian Irregular Satellites

Satellite Code Ephemeris Ref.
Himalia 506 JUP344 24
Elara 507 JUP344 24
Pasiphae 508 JUP344 24
Sinope 509 JUP344 24
Lysithea 510 JUP344 24
Carme 511 JUP344 24
Ananke 512 JUP344 24
Leda 513 JUP344 24
Callirrhoe 517 JUP344 24
Themisto 518 JUP344 24
Magaclite 519 JUP344 24
Taygete 520 JUP344 24
Chaldene 521 JUP344 24
Harpalyke 522 JUP344 24
Kalyke 523 JUP344 24
Iocaste 524 JUP344 24
Erinome 525 JUP344 24
Isonoe 526 JUP344 24
Praxidike 527 JUP344 24
Autonoe 528 JUP344 24
Thyone 529 JUP344 24
Hermippe 530 JUP344 24
Aitne 531 JUP344 24
Eurydome 532 JUP344 24
Euanthe 533 JUP344 24
Euporie 534 JUP344 24
Orthosie 535 JUP344 24
Sponde 536 JUP344 24
Kale 537 JUP344 24
Pasithee 538 JUP344 24
Hegemone 539 JUP344 24
Mneme 540 JUP344 24
Aoede 541 JUP344 24
Thelxinoe 542 JUP344 24
Arche 543 JUP344 24
Kallichore 544 JUP344 24
Helike 545 JUP344 24
Carpo 546 JUP344 24
Eukelade 547 JUP344 24
Cyllene 548 JUP344 24
Kore 549 JUP344 24
Herse 550 JUP344 24
S2010_J1 551 JUP344 24
S2010_J2 552 JUP344 24
Dia 553 JUP344 24
S2016_J1 554 JUP344 24
S2003_J18 555 JUP344 24
S2011_J2 556 JUP344 24
Eirene 557 JUP344 24
Philophrosyne 558 JUP344 24
S2017_J1 559 JUP344 24
Eupheme 560 JUP344 24
S2003_J19 561 JUP344 24
Valetudo 562 JUP344 24
S2017_J2 563 JUP344 24
S2017_J3 564 JUP344 24
Pandia 565 JUP344 24
S2017_J5 566 JUP344 24
S2017_J6 567 JUP344 24
S2017_J7 568 JUP344 24
S2017_J8 569 JUP344 24
S2017_J9 570 JUP344 24
Ersa 571 JUP344 24
S2011_J1 572 JUP344 24
S2003_J2 55501 JUP344 24
S2003_J4 55502 JUP344 24
S2003_J9 55503 JUP344 24
S2003_J10 55504 JUP344 24
S2003_J12 55505 JUP344 24
S2003_J16 55506 JUP344 24
S2003_J23 55507 JUP344 24

Jovian New 2023 Irregular Satellites

Satellite Code Ephemeris Ref.
S2011_J3 55509 JUP346 37
S2018_J2 55510 JUP346 37
S2018_J3 55511 JUP346 37
S2021_J1 55512 JUP346 37
S2021_J2 55513 JUP346 37
S2021_J3 55514 JUP346 37
S2021_J4 55515 JUP346 37
S2021_J5 55516 JUP346 37
S2021_J6 55517 JUP346 37
S2016_J3 55518 JUP346 37
S2016_J4 55519 JUP346 37
S2018_J4 55520 JUP346 37
S2022_J1 55521 JUP346 37
S2022_J2 55522 JUP346 37
S2022_J3 55523 JUP346 37

Saturnian Regular Satellites

Satellite Code Ephemeris Ref.
Mimas 601 SAT441 33
Enceladus 602 SAT441 33
Tethys 603 SAT441 33
Dione 604 SAT441 33
Rhea 605 SAT441 33
Titan 606 SAT441 33
Hyperion 607 SAT441 33
Iapetus 608 SAT441 33
Methone 632 SAT441 33
Helene 612 SAT441 33
Telesto 613 SAT441 33
Calypso 614 SAT441 33
Polydeuces 634 SAT441 33
Phoebe 609 SAT441 33

Saturnian Inner Satellites

Satellite Code Ephemeris Ref.
Janus 610 SAT415 14
Epimetheus 611 SAT415 14
Atlas 615 SAT415 14
Prometheus 616 SAT415 14
Pandora 617 SAT415 14
Pan 618 SAT415 14
Pallene 633 SAT415 14
Anthe 649 SAT415 14
Aegaeon 653 SAT415 14
Daphnis 635 SAT415 14

Saturnian Irregular Satellites

Satellite Code Ephemeris Ref.
Ymir 619 SAT452 34
Paaliaq 620 SAT452 34
Tarvos 621 SAT452 34
Ijiraq 622 SAT452 34
Suttungr 623 SAT452 34
Kiviuq 624 SAT452 34
Mundilfari 625 SAT452 34
Albiorix 626 SAT452 34
Skadi 627 SAT452 34
Erriapus 628 SAT452 34
Siarnaq 629 SAT452 34
Thrymr 630 SAT452 34
Narvi 631 SAT452 34
Aegir 636 SAT452 34
Bebhionn 637 SAT452 34
Bergelmir 638 SAT452 34
Bestla 639 SAT452 34
Farbauti 640 SAT452 34
Fenrir 641 SAT452 34
Fornjot 642 SAT452 34
Hati 643 SAT452 34
Hyrrokkin 644 SAT452 34
Kari 645 SAT452 34
Loge 646 SAT452 34
Skoll 647 SAT452 34
Surtur 648 SAT452 34
Jarnsaxa 650 SAT452 34
Greip 651 SAT452 34
Tarqeq 652 SAT452 34
Gridr 654 SAT452 34
Angrboda 655 SAT452 34
Skrymir 656 SAT452 34
Gerd 657 SAT452 34
S2004_S26 658 SAT452 34
Eggther 659 SAT452 34
S2004_S29 660 SAT452 34
Beli 661 SAT452 34
Gunnlod 662 SAT452 34
Thiazzi 663 SAT452 34
S2004_S34 664 SAT452 34
Alvaldi 665 SAT452 34
Geirrod 666 SAT452 34

Saturnian Provisional Irregular Satellites

Satellite Code Ephemeris Ref.
S2004_S31 65067 SAT453 38
S2004_S24 65070 SAT453 38
S2004_S28 65077 SAT453 38
S2004_S21 65079 SAT453 38
S2004_S36 65081 SAT453 38
S2004_S37 65082 SAT453 38
S2004_S39 65084 SAT453 38
S2004_S07 65085 SAT453 38
S2004_S12 65086 SAT453 38
S2004_S13 65087 SAT453 38
S2004_S17 65088 SAT453 38
S2006_S01 65089 SAT453 38
S2006_S03 65090 SAT453 38
S2007_S02 65091 SAT453 38
S2007_S03 65092 SAT453 38
S2019_S01 65093 SAT453 38
S2019_S02 65094 SAT453 38
S2019_S03 65095 SAT453 38
S2020_S01 65096 SAT453 38
S2020_S02 65097 SAT453 38
S2004_S40 65098 SAT453 38
S2006_S09 65100 SAT453 38
S2007_S05 65101 SAT453 38
S2020_S03 65102 SAT453 38
S2019_S04 65103 SAT453 38
S2004_S41 65104 SAT453 38
S2020_S04 65105 SAT453 38
S2020_S05 65106 SAT453 38
S2007_S06 65107 SAT453 38
S2004_S42 65108 SAT453 38
S2006_S10 65109 SAT453 38
S2019_S05 65110 SAT453 38
S2004_S43 65111 SAT453 38
S2004_S44 65112 SAT453 38
S2004_S45 65113 SAT453 38
S2006_S11 65114 SAT453 38
S2006_S12 65115 SAT453 38
S2019_S06 65116 SAT453 38
S2006_S13 65117 SAT453 38
S2019_S07 65118 SAT453 38
S2019_S08 65119 SAT453 38
S2019_S09 65120 SAT453 38
S2004_S46 65121 SAT453 38
S2019_S10 65122 SAT453 38
S2004_S47 65123 SAT453 38
S2019_S11 65124 SAT453 38
S2006_S14 65125 SAT453 38
S2019_S12 65126 SAT453 38
S2020_S06 65127 SAT453 38
S2019_S13 65128 SAT453 38
S2005_S04 65129 SAT453 38
S2007_S07 65130 SAT453 38
S2007_S08 65131 SAT453 38
S2020_S07 65132 SAT453 38
S2019_S14 65133 SAT453 38
S2019_S15 65134 SAT453 38
S2005_S05 65135 SAT453 38
S2006_S15 65136 SAT453 38
S2006_S16 65137 SAT453 38
S2006_S17 65138 SAT453 38
S2004_S48 65139 SAT453 38
S2020_S08 65140 SAT453 38
S2004_S49 65141 SAT453 38
S2004_S50 65142 SAT453 38
S2006_S18 65143 SAT453 38
S2019_S16 65144 SAT453 38
S2019_S17 65145 SAT453 38
S2019_S18 65146 SAT453 38
S2019_S19 65147 SAT453 38
S2019_S20 65148 SAT453 38
S2006_S19 65149 SAT453 38
S2004_S51 65150 SAT453 38
S2020_S09 65151 SAT453 38
S2004_S52 65152 SAT453 38
S2007_S09 65153 SAT453 38
S2004_S53 65154 SAT453 38
S2020_S10 65155 SAT453 38
S2019_S21 65156 SAT453 38
S2006_S20 65157 SAT453 38

Uranian Regular Satellites

Satellite Code Ephemeris Ref.
Ariel 701 URA111 10
Umbriel 702 URA111 10
Titania 703 URA111 10
Oberon 704 URA111 10
Miranda 705 URA111 10

Uranian Inner Satellites

Satellite Code Ephemeris Ref.
Cordelia 706 URA115 15
Ophelia 707 URA115 15
Bianca 708 URA115 15
Cressida 709 URA115 15
Desdemona 710 URA115 15
Juliet 711 URA115 15
Portia 712 URA115 15
Rosalind 713 URA115 15
Belinda 714 URA115 15
Puck 715 URA111 15
Perdita 725 URA115 15
Mab 726 URA115 15
Cupid 727 URA115 15

Uranian Irregular Satellites

Satellite Code Ephemeris Ref.
Caliban 716 URA117 22
Sycorax 717 URA117 22
Prospero 718 URA117 22
Setebos 719 URA117 22
Stephano 720 URA117 22
Trinculo 721 URA117 22
Ferdinand 722 URA117 22
Francisco 723 URA117 22
Margaret 724 URA117 22
S2023_U1 75051 URA117 22

Neptunian Satellites

Satellite Code Ephemeris Ref.
Triton 801 NEP097 21
Naiad 803 NEP097 21
Thalassa 804 NEP097 21
Despina 805 NEP097 21
Galatea 806 NEP097 21
Larissa 807 NEP097 21
Proteus 808 NEP097 21
Hippocamp 814 NEP097 21

Neptunian Irregular Satellites

Satellite Code Ephemeris Ref.
Nereid 802 NEP101 32
Halimede 809 NEP103 23
Psamathe 810 NEP103 23
Sao 811 NEP103 23
Laomedeia 812 NEP103 23
Neso 813 NEP103 23
S2002_N5 85051 NEP103 23
S2021_N1 85052 NEP103 23

Pluto Satellites

Satellite Code Ephemeris Ref.
Charon 901 PLU060 6
Nix 902 PLU060 6
Hydra 903 PLU060 6
Kerberos 904 PLU060 6
Styx 905 PLU060 6

References

  1. B. A. Archinal, C. H. Acton, M. F. A’Hearn, et~al. (2018) "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015". Celest.~Mech. 130:22.
  2. J. K. Campbell, J. D. Anderson (1989) "Gravity Field of the Saturnian System from Pioneer and Voyager Tracking Data". AJ 97:1485-1495.
  3. M. Brozović, R. A. Jacobson (2009) "The Orbits of the Outer Uranian Satellites". AJ 137:3834-3842.
  4. R. A. Jacobson (2009) "The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune". AJ 137:4322-4329.
  5. M. Brozović, R. A. Jacobson, S. S. Sheppard (2011) "The Orbits of the Outer Neptunian Satellites". AJ 141:135.
  6. M. Brozović, R. A. Jacobson (2024) "Post-New Horizons orbits and masses for the satellites of Pluto". AJ in press:00.
  7. R. Jacobson, M. Brozović, B. Gladman, M. Alexandersen, P. D. Nicholson, Veillet (2012) "Irregular satellites of the outer planets: orbital uncertainties and astrometric recoveries in 2009--2011". AJ 144:132.
  8. R. A. Jacobson (2014) "Update of the irregular Uranian satellite orbits with data through 2013 — URA112". personal communication to Horizons/NAIF.
  9. R. A. Jacobson (2014) "Update of Saturnian irregulars with Earthbased data through early 2014 and all Cassini imaging through 2013 — SAT368". personal communication to Horizons/NAIF.
  10. R. A. Jacobson (2014) "The Orbits of the Uranian Satellites and Rings, the Gravity Field of the Uranian System, and the Orientation of the Pole of Uranus". AJ 148:76-88.
  11. R. A. Jacobson, V. Lainey (2014) "Martian Satellite Orbits and Ephemerides". Planet. Space Sci. 102:35-44.
  12. M. Brozović, M. R. Showalter, R. A. Jacobson, M. W. Buie (2015) "The orbits and masses of satellites of Pluto". Icarus 246:317-329.
  13. M. Brozović, R. A. Jacobson (2017) "The Orbits of Jupiter's Irregular Satellites". AJ 153:147.
  14. R. A. Jacobson (2018) "Rock ephemeris file from fit to all Cassini data — SAT415". personal communication to Horizons/NAIF.
  15. M. Brozović, R. A. Jacobson (2019) "The Orbits of the inner satellites of Uranus: solution URA115". Interoffice Memo. 392R-19-007 (internal document).
  16. R. A. Jacobson, M. Brozovic, M. Showalter, A. Verbiscer, M. Buie, P. Helfenstein (2019) "The Orbits and Masses of Pluto's Satellites". In Pluto System After New Horizons 2133:7031.
  17. R. A. Jacobson (2019) "Ephemerides of the unnamed Saturnian irregulars including the 20 newly discovered ones — SAT428". personal communication to Horizons/NAIF.
  18. R. A. Jacobson (2020) "Ephemerides for the final comprehensive Cassini reconstruction — SAT427". personal communication to Horizons/NAIF.
  19. Marina Brozović, Mark R. Showalter, Robert A. Jacobson, Robert S. French, Jack J. Lissauer, Imke de Pater (2020) "Orbits and resonances of the regular moons of Neptune". Icarus 338:113462.
  20. R. A. Jacobson (2020) "The Orbits of the Regular Jovian Satellites, the Trajectories of Spacecraft at Jupiter, the Gravity Field of the Jovian System, and the Orientation of the Pole of Jupiter". Interoffice Memo. 392R-20-006 (internal document).
  21. M. Brozović (2020) "Update of the inner Neptunian satellite orbits — NEP097". personal communication to Horizons/NAIF.
  22. M. Brozović (2024) "Update of the outer Uranian satellite orbits — URA117". personal communication to Horizons/NAIF.
  23. M. Brozović (2024) "Update of the outer Neptunian satellite orbits — NEP103". personal communication to Horizons/NAIF.
  24. M. Brozović (2021) "Outer jovians with astrometry up to Nov 2020 — JUP344". personal communication to Horizons/NAIF.
  25. M. Brozović (2021) "Update of the inner Neptunian satellite orbits — NEP100". personal communication to Horizons/NAIF.
  26. R. A. Jacobson (2021) "The Orbits of the Regular Jovian Satellites and the Orientation of the Pole of Jupiter". personal communication to Horizons/NAIF.
  27. D. Durante, M. Parisi, D. Serra, M. Zannoni, V. Notaro, P. Racioppa, D. R. Buccino, G. Lari, L. Gomez Casajus, L. Iess, W. M. Folkner, G. Tommei, P. Tortora, S. J. Bolton (2020) "Jupiter's Gravity Field Halfway Through the Juno Mission". Geophys. Res. Lett. 47:e86572.
  28. M. Brozović (2021) "Update of Pluto's satellite orbits — PLU058". personal communication to Horizons/NAIF.
  29. M. Brozović, R. A. Jacobson (2021) "Ephemeris update ura116 for the irregular satellites of Uranus". Interoffice Memo. 392R-21-009 (internal document).
  30. R. A. Jacobson (2021) "Ephemerides of the unnamed Saturnian irregulars including the newly discovered S/2019~S1 — SAT450". personal communication to Horizons/NAIF.
  31. R. A. Jacobson (2021) "The Orbits of the Major Saturnian Satellites,the Trajectories of Spacecraft at Saturn, the Gravity Field of the Saturnian System, and the Orientation of Saturn's Pole". personal communication to Horizons/NAIF/Dragonfly.
  32. Marina Brozović, Robert A. Jacobson (2022) "Orbits of the irregular satellites of Uranus and Neptune". AJ 163:241.
  33. R. A. Jacobson (2022) "The Orbits of the Main Saturnian Satellites, the Saturnian System Gravity Field, and the Orientation of Saturn's Pole". AJ 164:199-217.
  34. R. A. Jacobson, M. Brozović, N. Mastrodemos, J. E. Riedel, S. S. Sheppard (2022) "Ephemerides of the Irregular Saturnian Satellites from Earth-based Astrometry and Cassini Imaging". AJ 164:240.
  35. R. A. Jacobson (2023) "Ephemerides of the Neptunian irregulars — NEP102". personal communication to Horizons/NAIF.
  36. M. Brozovic (2023) "Ephemerides of the 12 new jovian irregulars — JUP345". personal communication to Horizons/NAIF.
  37. M. Brozovic (2023) "Ephemerides of the 15 new jovian irregulars — JUP346". personal communication to Horizons/NAIF.
  38. R. A. Jacobson (2023) "Update of the provisional irregular Saturnian satellite orbits with data through 2022 — SAT453". personal communication to Horizons/NAIF.