S/2022 J 1
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 30 August 2022 |
| Orbital characteristics | |
| Epoch 31 March 2024 (JD 2460400.5) | |
| Observation arc | 20.62 yr (7,530 d) |
| Earliest precovery date | 24 February 2003 |
| 0.1588863 AU (23,769,050 km) | |
| Eccentricity | 0.1357222 |
| –2.05 yr (–748.64 days) | |
| 184.22280° | |
| 0° 28m 51.136s / day | |
| Inclination | 165.94051° (to ecliptic) |
| 51.07021° | |
| 334.92072° | |
| Satellite of | Jupiter |
| Group | Carme group |
| Physical characteristics | |
| ≈2 km | |
| Albedo | 0.04 (assumed) |
| 23.8 (average) | |
| 17.0 | |
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.
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°. It has a diameter of about 2 km (1.2 mi) for an absolute magnitude of 17.0. The moon has been observed for over 20 years, with the earliest known observation on 24 February 2003.