S/2022 J 1

Outer moon of Jupiter

S/2022 J 1
Discovery^[1]
Discovered by	Scott S. Sheppard
Discovery site	Cerro Tololo Obs.
Discovery date	30 August 2022
Orbital characteristics ^[2]^[3]
Epoch 31 March 2024 (JD 2460400.5)
Observation arc	20.62 yr (7,530 d)
Earliest precovery date	24 February 2003
Semi-major axis	0.1588863 AU (23,769,050 km)
Eccentricity	0.1357222
Orbital period (sidereal)	–2.05 yr (–748.64 days)
Mean anomaly	184.22280°
Mean motion	0° 28^m 51.136^s / day
Inclination	165.94051° (to ecliptic)
Longitude of ascending node	51.07021°
Argument of perihelion	334.92072°
Satellite of	Jupiter
Group	Carme group
Physical characteristics
Mean diameter	≈2 km^[4]
Albedo	0.04 (assumed)^[4]
Apparent magnitude	23.8 (average)^[4]
Absolute magnitude (H)	17.0^[1]^[2]

S/2022 J 1 is a small outer natural satellite of Jupiter discovered by Scott S. Sheppard on 30 August 2022, using the 4.0-meter Víctor M. Blanco Telescope at Cerro Tololo Observatory, Chile. It was announced by the Minor Planet Center on 22 February 2023, after observations were collected over a long enough time span to confirm the satellite's orbit.^[1]

S/2022 J 1 is part of the Carme group, a tight cluster of retrograde irregular moons of Jupiter that follow similar orbits to Carme at semi-major axes between 22–24 million km (14–15 million mi), orbital eccentricities between 0.2 and 0.3, and inclinations between 163 and 166°.^[4] It has a diameter of about 2 km (1.2 mi) for an absolute magnitude of 17.0.^[4] The moon has been observed for over 20 years, with the earliest known observation on 24 February 2003.^[2]

References

[edit ]

^ ^a ^b ^c "MPEC 2023-D44 : S/2022 J 1". Minor Planet Electronic Circulars. Minor Planet Center. 22 February 2023. Retrieved 22 February 2023.
^ ^a ^b ^c "MPEC 2024-D116 : S/2022 J 1". Minor Planet Electronic Circulars. Minor Planet Center. 23 February 2024. Retrieved 23 February 2024.
^ "Planetary Satellite Discovery Circumstances". JPL Solar System Dynamics. NASA. Retrieved 22 February 2023.
^ ^a ^b ^c ^d ^e Sheppard, Scott S. "Moons of Jupiter". Earth & Planets Laboratory. Carnegie Institution for Science. Retrieved 22 February 2023.

v t e 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
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