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S/2021 J 4

S/2021 J 4
Penemuan[1]
Ditemukan olehScott S. Sheppard
Situs penemuanObservatorium Las Campanas
Tanggal penemuan14 Agustus 2021
Ciri-ciri orbit[1][2]
Epos 25 Februari 2023 (JD 2460000,5)
Rentang pengamatan1,17 th (427 h)
01.533.891 AU (2,294668×1014 km)
Eksentrisitas0,1585459
–1,94 th (–710,13 hari)
102,76481°
0° 30m 25.027s / hari
Inklinasi164,54657° (terhadap ekliptika)
218,88401°
217,30730°
Satelit dariJupiter
Ciri-ciri fisik
Diameter rata-rata
1 km[3]
24,0[3]
17,4[1]

S/2021 J 4 adalah satelit alami kecil bagian luar Jupiter yang ditemukan oleh Scott S. Sheppard pada 14 Agustus 2021, menggunakan Teleskop 6,5 meter Magellan-Baade di Observatorium Las Campanas, Chili. Satelit ini diumumkan oleh Minor Planet Center pada 19 Januari 2023, setelah pengamatan dikumpulkan dalam rentang waktu yang cukup lama untuk mengonfirmasi orbit satelit.[1]

S/2021 J 4 adalah bagian dari kelompok Carme, sekelompok satelit tak beraturan retrograde Jupiter yang mengikuti orbit yang mirip dengan Carme pada sumbu semimayor antara 22–24 juta km (14–15 juta mi), eksentrisitas orbit antara 0,2–0,3, dan inklinasi antara 163–166°.[3] Satelit ini berdiameter sekitar 1 km (0,62 mi) dengan magnitudo mutlak sebesar 17,4, menjadikannya sebagai salah satu satelit terkecil Jupiter yang diketahui.[3]

Referensi

  1. ^ a b c d "MPEC 2023-B40 : S/2021 J 4". Minor Planet Electronic Circulars. Minor Planet Center. 19 Januari 2023. Diakses tanggal 20 Januari 2023. 
  2. ^ "Planetary Satellite Discovery Circumstances". JPL Solar System Dynamics. NASA. Diakses tanggal 10 Januari 2023. 
  3. ^ a b c d Sheppard, Scott S. "Moons of Jupiter". Earth & Planets Laboratory. Carnegie Institution for Science. Diakses tanggal 10 Januari 2023. 


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