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.[1]

S/2022 J 3
Discovery[1]
Discovered byScott S. Sheppard
Discovery siteCerro Tololo Obs.
Discovery date30 August 2022
Orbital characteristics[1][2]
Epoch 25 February 2023 (JD 2460000.5)
0.1397905 AU (20,912,360 km)
Eccentricity0.2721788
–1.69 yr (–617.82 days)
77.88890°
0° 34m 57.706s / day
Inclination144.45215° (to ecliptic)
294.05598°
45.24901°
Satellite ofJupiter
GroupAnanke group
Physical characteristics
Mean diameter
≈1 km[3]
Albedo0.04 (assumed)[3]
23[3]
17.4[1]

    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°.[3] It has a diameter of about 1 km (0.62 mi) for an absolute magnitude of 17.4.[3]

    References
    1. "MPEC 2023-D46 : S/2022 J 3". Minor Planet Electronic Circulars. Minor Planet Center. 22 February 2023. Retrieved 22 February 2023.
    2. "Planetary Satellite Discovery Circumstances". JPL Solar System Dynamics. NASA. Retrieved 22 February 2023.
    3. Sheppard, Scott S. "Moons of Jupiter". Earth & Planets Laboratory. Carnegie Institution for Science. Retrieved 22 February 2023.


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