Hydra (satelit)

Hydra
Gambar berwarna yang disempurnakan dari Hydra, diambil oleh New Horizons.
Penemuan
Ditemukan olehHubble Space Telescope
Pluto Companion Search Team
Tanggal penemuan15 Juni 2005
Penamaan
Pelafalan/ˈhdrə/
Asal nama
Lernaean Hydra
S/2005 P 1, P1, Pluto III[1]
Kata sifat bahasa InggrisHydrian
Ciri-ciri orbit[2]
64.738±3 km
Eksentrisitas0,005862±0,000025
38,20177±0,00003 h
Inklinasi0,242°±0,005°
Satelit dariPluto
Ciri-ciri fisik
Dimensi50,9 km × 36,1 km × 30,9 km[3]
Massa(4,8±4,2)×1016 kg[4]
Massa jenis rata-rata
2,13 g/cm3[3]
0,00520055269 g[5]
0.4295 ± 0.0008 h (semrawut)[4]
110°[6]
Albedo0.83 ± 0.08 (geometris)[4]
Suhu23 K[7]
22.9–23.3 [8]

Hydra adalah sebuah satelit alami terluar dikenal dari Pluto. Hal ini ditemukan bersama dengan Nix pada bulan Juni 2005, dan untuk dikunjungi bersama dengan Pluto dengan misi New Horizons pada bulan Juli 2015.

Hydra ditemukan oleh Hubble Space Telescope's Pluto Companion Search Team, yang terdiri dari A. Hal Weaver, Alan Stern, Max J. Mutchler, Andrew J. Steffl, Marc Buie W., William J. Merline, John R. Spencer, Eliot F. Young, dan Leslie A. Young. Gambar Penemuan diambil pada tanggal 15 Mei 2005 dan 18 Mei 2005; Nix dan Hydra secara independen ditemukan oleh Max J. Mutchler pada tanggal 15 Juni 2005, dan Andrew J. Steffl pa8da 15 Agustus 2005. Penemuan diumumkan pada tanggal 31 Oktober 2005, setelah konfirmasi oleh precoveries dari tahun 2002. Mereka untuk sementara ditunjuk S/2005 P1 (Hydra) dan S/2005 P2 (Nix).

Referensi

  1. ^ Jennifer Blue (11 September 2009). "Gazetteer of Planetary Nomenclature". IAU Working Group for Planetary System Nomenclature (WGPSN). 
  2. ^ Showalter, M. R.; Hamilton, D. P. (3 June 2015). "Resonant interactions and chaotic rotation of Pluto's small moons". Nature. 522 (7554): 45–49. Bibcode:2015Natur.522...45S. doi:10.1038/nature14469. PMID 26040889. 
  3. ^ a b Verbiscer, A. J.; Porter, S. B.; Buratti, B. J.; Weaver, H. A.; Spencer, J. R.; Showalter, M. R.; Buie, M. W.; Hofgartner, J. D.; Hicks, M. D.; Ennico-Smith, K.; Olkin, C. B.; Stern, S. A.; Young, L. A.; Cheng, A. (2018). "Phase Curves of Nix and Hydra from the New Horizons Imaging Cameras". The Astrophysical Journal. 852 (2): L35. doi:10.3847/2041-8213/aaa486. 
  4. ^ a b c Stern, S. A.; Bagenal, F.; Ennico, K.; Gladstone, G. R.; et al. (15 October 2015). "The Pluto system: Initial results from its exploration by New Horizons". Science. 350 (6258): aad1815. arXiv:1510.07704alt=Dapat diakses gratis. Bibcode:2015Sci...350.1815S. doi:10.1126/science.aad1815. PMID 26472913. 
  5. ^ "Hydra By the Numbers". solarsystem.nasa.gov. NASA. Diakses tanggal 7 March 2019. 
    (Original value of 0,051 m/s2 converted to g)
  6. ^ Weaver, H. A.; Buie, M. W.; Showalter, M. R.; Stern, S. A.; et al. (18 April 2016). "The Small Satellites of Pluto as Observed by New Horizons". Science. 351 (6279): aae0030. arXiv:1604.05366alt=Dapat diakses gratis. Bibcode:2016Sci...351.0030W. doi:10.1126/science.aae0030. PMID 26989256. 
  7. ^ Cook, Jason C.; Dalle Ore, Cristina M.; Protopapa, Silvia; Binzel, Richard P.; Cartwright, Richard; Cruikshank, Dale P.; et al. (15 November 2018). "Composition of Pluto's small satellites: Analysis of New Horizons spectral images". Icarus. 315: 30–45. Bibcode:2017LPI....48.2478C. doi:10.1016/j.icarus.2018.05.024. Diakses tanggal 27 June 2019. 
  8. ^ Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). "The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006". Astronomical Journal. 132 (3): 1405–1414. arXiv:astro-ph/0607507alt=Dapat diakses gratis. Bibcode:2006AJ....132.1405S. doi:10.1086/506347.  (Final preprint)

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