S/2022 J 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.
| Discovery | |
|---|---|
| Discovered by | Scott S. Sheppard |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 30 August 2022 |
| Orbital characteristics | |
| Epoch 25 February 2023 (JD 2460000.5) | |
| 0.1397905 AU (20,912,360 km) | |
| Eccentricity | 0.2721788 |
| –1.69 yr (–617.82 days) | |
| 77.88890° | |
| 0° 34m 57.706s / day | |
| Inclination | 144.45215° (to ecliptic) |
| 294.05598° | |
| 45.24901° | |
| Satellite of | Jupiter |
| Group | Ananke group |
| Physical characteristics | |
Mean diameter | ≈1 km |
| Albedo | 0.04 (assumed) |
| 23 | |
| 17.4 | |
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 17.4.
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