S/2017 J 10

S/2017 J 10
	Discovery images of S/2017 J 10 from the 4.0-m Victor M. Blanco Telescope's Dark Energy Camera (DECam) at Cerro Tololo Observatory in March 2023.
Discovery
Discovered by	Scott S. Sheppard
Discovery site	Cerro Tololo Obs.
Discovery date	23 March 2017
Orbital characteristics
	Epoch 5 May 2025 (JD 2460800.5)
Earliest precovery date	27 February 2003
Semi-major axis	0.14088302 AU (21,075,800 km)
Eccentricity	0.2587634
Orbital period (sidereal)	−645.09 d
Mean anomaly	62.49100°
Mean motion	0° 33m 29.014s / day
Inclination	145.57259° (to ecliptic)
Longitude of ascending node	38.65145°
Argument of perihelion	239.09093°
Satellite of	Jupiter
Group	Ananke group
Physical characteristics
Mean diameter	1 km
Albedo	0.28 (assumed)
Apparent magnitude	24.1
Absolute magnitude (H)	17.0

S/2017 J 10 is a small outer natural satellite of Jupiter discovered by Scott S. Sheppard on 23 March 2017, using the 4.0-meter Víctor M. Blanco Telescope at Cerro Tololo Observatory, Chile. It was announced by the Minor Planet Center on 30 April 2025, after observations were collected over a long enough time span to confirm the satellite's orbit.^[1]

S/2017 J is part of the Ananke group, a cluster of retrograde irregular moons of Jupiter that follow similar orbits to Ananke at semi-major axes between 19–22 million km (12–14 million mi), orbital eccentricities between 0.1 and 0.4, and inclinations between 139 and 155°. It has a diameter of about 1 km (0.62 mi) for an absolute magnitude of 17.0.^[2]

References

^ "MPEC 2025-H210 : S/2017 J 10". www.minorplanetcenter.net. Retrieved 2025-08-29.
^ Sheppard, Scott S. "Scott S. Sheppard - JupiterMoons". sites.google.com. Retrieved 2025-08-29.

Moons of Jupiter
Listed in increasing approximate distance from Jupiter
Inner moons	Metis Adrastea Amalthea Thebe
Galilean moons	Io Europa Ganymede Callisto
Themisto	Themisto
Himalia group (9)	Leda Ersa S/2018 J 2 Himalia Pandia Lysithea Elara S/2011 J 3 Dia
Carpo group (2)	S/2018 J 4 Carpo
Valetudo	Valetudo
Ananke group (27)	Euporie Jupiter LV Eupheme S/2021 J 3 Jupiter LII Jupiter LIV Mneme Euanthe S/2003 J 16 Harpalyke Orthosie Helike S/2021 J 2 Praxidike Jupiter LXIV S/2021 J 1 S/2003 J 12 Jupiter LXVIII Thelxinoe Thyone S/2003 J 2 S/2022 J 3 Ananke Iocaste S/2017 J 10 Hermippe Jupiter LXX
Carme group (31)	S/2016 J 3 S/2022 J 1 Jupiter LXIX Pasithee S/2021 J 6 S/2003 J 24 Chaldene Jupiter LXIII Isonoe S/2017 J 11 Kallichore S/2021 J 4 Erinome Kale Eirene Aitne Eukelade S/2022 J 2 Arche Taygete Jupiter LXXII Carme Herse Jupiter LXI Jupiter LI S/2003 J 9 Jupiter LXVI Kalyke S/2003 J 10 S/2018 J 3 S/2021 J 5
Pasiphae group (18)	Philophrosyne Eurydome Jupiter LVI S/2003 J 4 S/2016 J 4 Jupiter LXVII Hegemone Pasiphae Sponde Megaclite Cyllene Sinope Jupiter LIX Aoede Autonoe Callirrhoe S/2003 J 23 Kore
See also	Rings of Jupiter Jupiter's moons in fiction
Category