Hydra (muin)

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Hydra
Pluto system 2005 discovery images.jpg
Discovery images o Hydra (an Nix)
Discovery
Discovered biHubble Space Telescope
Pluto Companion Search Team
Discovery dateJuin 2005
Designations
Pronunciation/ˈhdrə/
Named after
Lernaean Hydra
(134340) Pluto III
AdjectivesHydrian
Orbital chairactereestics[1]
64749 km
Eccentricity0.0051
38.206±0.001 d
Inclination0.212°
Satellite oPluto
Pheesical chairacteristics
Mean radius
30–84 km[2]
Mass4.2×1017 kg[3]
Mean density
(unkent)
chaotic
variable
Albedo0.04–0.35 (assumed)[4]
Temperatur33–55 K
22.9–23.3 (measurt)[4]

Hydra is the ootermaist kent naitural satellite o Pluto. It wis discovered alang wi Nix in Juin 2005, an is tae be veesitit alang wi Pluto bi the New Horizons mission in Julie 2015.[5]

References[eedit | eedit soorce]

  1. doi: 10.1086/504422
    This citation will be automatically completed in the next few minutes. You can jump the queue or expand by hand. a, i, e per JPL (site updated 2008 Aug 25)
  2. H. A. Weaver; S. A. Stern; M. J. Mutchler; A. J. Steffl; M. W. Buie; W. J. Merline; J. R. Spencer; E. F. Young & L. A. Young (23 February 2006). "Discovery of two new satellites of Pluto". Nature. 439 (7079): 943–945. arXiv:astro-ph/0601018Freely accessible. Bibcode:2006Natur.439..943W. doi:10.1038/nature04547. PMID 16495991. 
  3. Tholen, David J.; M. W. Buie; W. M. Grundy (October 2010). "Improved Masses of Nix and Hydra". AAS DPS Meeting #42. 42: 984. Bibcode:2010DPS....42.2008T. 
  4. 4.0 4.1 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): submitted. arXiv:astro-ph/0607507Freely accessible. Bibcode:2006AJ....132.1405S. doi:10.1086/506347.  (Final preprint)
  5. Cain, Fraser (2008). "Pluto's Moon Hydra".