Nereid (muin)

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Nereid
Image o Nereid by Voyager 2
Image o Nereid bi Voyager 2
Discovery
Discovered bi Gerard P. Kuiper[1]
Discovery date Mey 1, 1949
Designations
Pronunciation /ˈnɪəri.ɪd/ or /ˈnɛri.ɪd/
Adjectives Nereidian, Nereidean
Orbital chairactereestics
Epoch J2000
Periapsis 1,372,000 km (0.00917 AU)
Apoapsis 9,655,000 km (0.06454 AU)
5,513,787 km (0.03685 AU)
Eccentricity 0.7507 [2][3]
360.1362 d
934 m/s
Inclination
Satellite o Neptune
Pheesical chairacteristics
Mean radius
170 ± 25 km[4]
Mass 3.1×1019 kg (assumed)[4]
Mean density
1.5 g/cm³ (assumed)[4]
~0.072 m/s²
~0.156 km/s
0.48 d (11 h 31 min)[5]
Albedo 0.155[4]
Temperatur ~50 K mean (estimate)

Nereid is the third-lairgest muin o Neptune. It haes a heichly eccentric orbit. It wis the seicont muin o Neptune tae be discovered, bi Gerard Kuiper in 1949.

References[eedit | eedit soorce]

  1. Kuiper, G. P. (August 1949). "The Second Satellite of Neptune". Publications of the Astronomical Society of the Pacific. 61: 175–176. Bibcode:1949PASP...61..175K. doi:10.1086/126166. 
  2. 2.0 2.1 Jacobson, R. A. — AJ (2009-04-03). "Planetary Satellite Mean Orbital Parameters". JPL satellite ephemeris. JPL (Solar System Dynamics). Retrieved 2011-10-26.  Archived 5 October 2011 at WebCite.
  3. 3.0 3.1 Jacobson, R. A. (3 Aprile 2009). "The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune". The Astronomical Journal. 137 (5): 4322–4329. Bibcode:2009AJ....137.4322J. doi:10.1088/0004-6256/137/5/4322. 
  4. 4.0 4.1 4.2 4.3 "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). Archived frae the oreeginal on 2010-01-18. Retrieved 2011-10-26. 
  5. Grav, T.; M. Holman, J. J. Kavelaars (2003). "The Short Rotation Period of Nereid". The Astrophysical Journal. 591 (1): 71–74. Bibcode:2003ApJ...591L..71G. arXiv:astro-ph/0306001. doi:10.1086/377067.  Unknown parameter |coauthors= ignored (help)