Rosalind (satelit)

Rosalind
Teleskop Luar Angkasa Hubble mengabadikan citra Rosalind yang mengorbit Uranus pada tahun 1997
Teleskop Luar Angkasa Hubble mengabadikan citra Rosalind yang mengorbit Uranus pada tahun 1997
Penemuan
Ditemukan olehStephen P. Synnott / Voyager 2
Tanggal penemuan13 Januari 1986
Penamaan
Penamaan
Uranus XIII
Kata sifat bahasa InggrisRosalindian[1]
Ciri-ciri orbit
Jari-jari orbit rata-rata
69.926,795 ± 0,053 km[2]
Eksentrisitas0,00011 ± 0,000103[2]
0,558459529 ± 0,000000019 hari[2]
Inklinasi0,27876 ± 0,045° (ke khatulistiwa Uranus)[2]
Satelit dariUranus
Ciri-ciri fisik
Dimensi72 × 72 × 72 km[3]
Jari-jari rata-rata
36 ± 6 km[3][4][5]
~16.000 km²[a]
Volume~200.000 km³[a]
Massa~2,5×1017 kg[a]
Massa jenis rata-rata
~1,3 g/cm³ (diasumsikan)[4]
~0,012 m/s²[a]
~0,031 km/s[a]
sinkron[3]
nol[3]
Albedo0,08 ± 0,01[6]
Suhu~64 K[a]

Rosalind adalah satelit bagian dalam Uranus. Rosalind ditemukan dari citra-citra yang diabadikan oleh Voyager 2 pada 13 Januari 1986, dan diberikan penamaan sementara S/1986 U 4.[7] Rosalind dinamai menurut nama putri dari seorang adipati yang terbuang dalam sandiwara komedi Manasuka karya William Shakespeare. Satelit ini juga diberikan penomoran Uranus XIII.[8]

Rosalind berasal dari kelompok satelit Portia, yang di dalamnya juga terdapat satelit Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Belinda, dan Perdita.[6] Satelit-satelit tersebut memiliki orbit dan karakteristik fotomerik yang serupa.[6] Selain orbit, radius sebesar 36 km[3] dan albedo geometrik sebesar 0,08[6] hampir tidak ada yang diketahui mengenai Rosalind.

Dalam citra-citra yang diabadikan Voyager 2, Rosalind terlihat sebagai objek yang bentuknya hampir bulat. Rasio sumbu sferoid lonjong Rosalind sebesar 0,8-1,0.[3] Permukaannya berwarna abu-abu.[3]

Rosalind sangat dekat dengan resonansi orbit 3:5 dengan Cordelia.[9]

Lihat pula

Referensi

Catatan penjelasan

  1. ^ a b c d e f Dihitung berdasarkan parameter-parameter lainnya.

Kutipan

  1. ^ Bertrand Evans (1966) Teaching Shakespeare in the high school, hlm. 213
  2. ^ a b c d Jacobson, R. A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager 2 Observations". The Astronomical Journal. 115 (3): 1195–1199. Bibcode:1998AJ....115.1195J. doi:10.1086/300263. 
  3. ^ a b c d e f g Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites". Icarus. 151 (1): 69–77. Bibcode:2001Icar..151...69K. doi:10.1006/icar.2001.6597. 
  4. ^ a b "Planetary Satellite Physical Parameters". Jet Propulsion Laboratory (Solar System Dynamics). 24 Oktober 2008. Diakses tanggal 12 Desember 2008. 
  5. ^ Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Diakses tanggal 12 Desember 2008. 
  6. ^ a b c d Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope". Icarus. 151 (1): 51–68. Bibcode:2001Icar..151...51K. doi:10.1006/icar.2001.6596. 
  7. ^ Smith, B. A. (16 Januari 1986). "Satellites of Uranus". IAU Circular. 4164. Diakses tanggal 1 November 2011. 
  8. ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. 21 Juli 2006. Diakses tanggal 6 Agustus 2006. 
  9. ^ Murray, Carl D.; Thompson, Robert P. (6 Desember 1990). "Orbits of shepherd satellites deduced from the structure of the rings of Uranus". Nature. 348 (6301): 499–502. Bibcode:1990Natur.348..499M. doi:10.1038/348499a0. ISSN 0028-0836. 

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