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 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 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. ^ a b c d "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. ^ a b c d e Sheppard, Scott S. "Moons of Jupiter". Earth & Planets Laboratory. Carnegie Institution for Science. Retrieved 22 February 2023.


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