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Natural Satellites Ephemeris Service

Ephemerides, orbital elements and residual blocks for the outer irregular satellites of the giant planets are available here.

Choose which objects you wish to observe, select what information you want returned, indicate your ephemeris options (if necessary) and then select the "Get Information" button. 

Selection of Objects


 All Jovian outer irregular satellites

 All unnumbered Jovian outer irregular satellites

 All numbered Jovian outer irregular satellites

 Just the following Jovian outer irregular satellites

   S/2011 J 2                     Jupiter XLVII (Eukelade)       Jupiter XXVII (Praxidike)

   S/2011 J 1                     Jupiter XLVI (Carpo)           Jupiter XXVI (Isonoe)

   S/2010 J 2                     Jupiter XLV (Helike)           Jupiter XXV (Erinome)

   S/2010 J 1                     Jupiter XLIV (Kallichore)      Jupiter XXIV (Iocaste)

   S/2003 J 23                    Jupiter XLIII (Arche)          Jupiter XXIII (Kalyke)

   S/2003 J 19                    Jupiter XLII (Thelxinoe)       Jupiter XXII (Harpalyke)

   S/2003 J 18                    Jupiter XLI (Aoede)            Jupiter XXI (Chaldene)

   S/2003 J 16                    Jupiter XL (Mneme)             Jupiter XX (Taygete)

   S/2003 J 15                    Jupiter XXXIX (Hegemone)       Jupiter XIX (Megaclite)

   S/2003 J 12                    Jupiter XXXVIII (Pasithee)     Jupiter XVIII (Themisto)

   S/2003 J 10                    Jupiter XXXVII (Kale)          Jupiter XVII (Callirrhoe)

   S/2003 J 9                     Jupiter XXXVI (Sponde)         Jupiter XIII (Leda)

   S/2003 J 5                     Jupiter XXXV (Orthosie)        Jupiter XII (Ananke)

   S/2003 J 4                     Jupiter XXXIV (Euporie)        Jupiter XI (Carme)

   S/2003 J 3                     Jupiter XXXIII (Euanthe)       Jupiter X (Lysithea)

   S/2003 J 2                     Jupiter XXXII (Eurydome)       Jupiter IX (Sinope)

   S/2000 J 11                    Jupiter XXXI (Aitne)           Jupiter VIII (Pasiphae)

   Jupiter L (Herse)              Jupiter XXX (Hermippe)         Jupiter VII (Elara)

   Jupiter XLIX (Kore)            Jupiter XXIX (Thyone)          Jupiter VI (Himalia)

   Jupiter XLVIII (Cyllene)       Jupiter XXVIII (Autonoe)

 All Saturnian outer irregular satellites

 All unnumbered Saturnian outer irregular satellites

 All numbered Saturnian outer irregular satellites

 Just the following Saturnian outer irregular satellites

   S/2007 S 3                     Saturn XLVI (Loge)             Saturn XXIX (Siarnaq)

   S/2007 S 2                     Saturn XLV (Kari)              Saturn XXVIII (Erriapus)

   S/2006 S 3                     Saturn XLIV (Hyrrokkin)        Saturn XXVII (Skathi)

   S/2006 S 1                     Saturn XLIII (Hati)            Saturn XXVI (Albiorix)

   S/2004 S 17                    Saturn XLII (Fornjot)          Saturn XXV (Mundilfari)

   S/2004 S 13                    Saturn XLI (Fenrir)            Saturn XXIV (Kiviuq)

   S/2004 S 12                    Saturn XL (Farbauti)           Saturn XXIII (Suttungr)

   S/2004 S 7                     Saturn XXXIX (Bestla)          Saturn XXII (Ijiraq)

   Saturn LII (Tarqeq)            Saturn XXXVIII (Bergelmir)     Saturn XXI (Tarvos)

   Saturn LI (Greip)              Saturn XXXVII (Bebhionn)       Saturn XX (Paaliaq)

   Saturn L (Jarnsaxa)            Saturn XXXVI (Aegir)           Saturn XIX (Ymir)

   Saturn XLVIII (Surtur)         Saturn XXXI (Narvi)            Saturn IX (Phoebe)

   Saturn XLVII (Skoll)           Saturn XXX (Thrymr)            Saturn VIII

 All Uranian outer irregular satellites

 All unnumbered Uranian outer irregular satellites

 All numbered Uranian outer irregular satellites

 Just the following Uranian outer irregular satellites

   Uranus XXIV (Ferdinand)        Uranus XXI (Trinculo)          Uranus XVIII (Prospero)

   Uranus XXIII (Margaret)        Uranus XX (Stephano)           Uranus XVII (Sycorax)

   Uranus XXII (Francisco)        Uranus XIX (Setebos)           Uranus XVI (Caliban)

 All Neptunian outer irregular satellites

 All unnumbered Neptunian outer irregular satellites

 All numbered Neptunian outer irregular satellites

 Just the following Neptunian outer irregular satellites

   Neptune XIII (Neso)            Neptune XI (Sao)               Neptune IX (Halimede)

   Neptune XII (Laomedeia)        Neptune X (Psamathe)           Neptune II (Nereid)

Output Format(s) Required

I require Ephemerides

I require Orbital Elements
either Multi-line format or One-line format
Please Show residual blocks

Ephemeris Options

The desired start date for the ephemerides should be entered in YYYY MM DD format (e.g., 2004 July 2 = 2004 07 02). The default is the most recent 0h UT hour.

Start date: Number of dates to output

Ephemeris interval: Ephemeris units: days hours minutes seconds

Observatory code:

Display positions in: truncated sexagesimal or full sexagesimal or decimal units

Total motion and direction
Separate R.A. and Decl. coordinate motions
Separate R.A. and Decl. sky motions
Display motions as: "/sec "/min "/hr °/day

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