Nereid (muin)
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![]() 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 | |
Average orbital speed | 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]
- ↑ 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.
- ↑ 2.0 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.
- ↑ 3.0 3.1 Jacobson, R. A. (3 April 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.
- ↑ 4.0 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.
- ↑ Grav, T. (2003). "The Short Rotation Period of Nereid". The Astrophysical Journal. 591 (1): 71–74. arXiv:astro-ph/0306001
. Bibcode:2003ApJ...591L..71G. doi:10.1086/377067. Unkent parameter
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