S/2022 J 3
| 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 | 20.61 yr (7,528 d) |
| Earliest precovery date | 26 February 2003 |
| 0.1373821 AU (20,552,070 km) | |
| Eccentricity | 0.2125986 |
| –1.65 yr (–601.92 days) | |
| 294.51229° | |
| 0° 35m 53.108s / day | |
| Inclination | 145.73211° (to ecliptic) |
| 302.06960° | |
| 67.60587° | |
| Satellite of | Jupiter |
| Group | Ananke group |
| Physical characteristics | |
| ≈1 km | |
| Albedo | 0.04 (assumed) |
| 24.0 (average) | |
| 17.3 | |
S/2022 J 3 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 3 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 17.3. The moon has been observed for over 20 years, with the earliest known observation on 26 February 2003.