Laomedeia
 Laomedeia imaged by the Very Large Telescope's FORS1 imager in September 2002 | |
| Discovery[1][2] | |
|---|---|
| Discovered by | |
| Discovery date | August 13, 2002 |
| Designations | |
Designation | Neptune XII |
| Pronunciation | /ˌleɪəməˈdiːə/ |
Named after | Λαομέδεια Lāomedeia |
| S/2002 N 3 | |
| Adjectives | Laomedeian[3] |
| Orbital characteristics[4] | |
| Epoch 2003 Jun. 10.00 TT | |
| 23,613,000 km | |
| Eccentricity | 0.3969 |
| 3171.33 days (8.68 yr) | |
| Inclination | 37.874° |
| Satellite of | Neptune |
| Group | Sao group |
| Physical characteristics | |
Mean diameter | 42 km (for albedo 0.04)[5] |
| Albedo | 0.04 (assumed)[5] |
Laomedeia /ˌleɪəməˈdiːə/, also known as Neptune XII, is a prograde irregular satellite of Neptune. It was discovered by Matthew J. Holman, et al. on August 13, 2002.[6] Before the announcement of its name on February 3, 2007 (IAUC 8802), it was known as S/2002 N 3.
It orbits Neptune at a distance of about 23,571,000 km and is about 42 kilometers in diameter (assuming albedo of 0.04).[5] It is named after Laomedeia, one of the 50 Nereids.
References[edit]
- ^ JPL (2011-07-21). "Planetary Satellite Discovery Circumstances". Jet Propulsion Laboratory. Retrieved 2011-10-24.
- ^ Green, Daniel W. E. (January 13, 2003). "Satellites of Neptune". IAU Circular. 8047. Retrieved 2011-10-24.
- ^ "Laomedian" in Otley (1828) Essays on the nature, causes and effects of national antipathies
- ^ Jacobson, R. A. (2008). "NEP078 – JPL satellite ephemeris". Planetary Satellite Mean Orbital Parameters. Retrieved 2009-09-23.
- ^ a b c Sheppard, Scott S.; Jewitt, David C.; Kleyna, Jan (2006). "A Survey for "Normal" Irregular Satellites around Neptune: Limits to Completeness". The Astronomical Journal. 132 (1): 171–176. arXiv:astro-ph/0604552. Bibcode:2006AJ....132..171S. doi:10.1086/504799. S2CID 154011.
- ^ Holman, M. J.; Kavelaars, J. J.; Grav, T.; et al. (2004). "Discovery of five irregular moons of Neptune" (PDF). Nature. 430 (7002): 865–867. Bibcode:2004Natur.430..865H. doi:10.1038/nature02832. PMID 15318214. S2CID 4412380. Retrieved 24 October 2011.
External links[edit]
- Neptune's Known Satellites, by Scott S. Sheppard
- David Jewitt pages
- MPC: Natural Satellites Ephemeris Service
- Mean orbital parameters, NASA
Listed in approximately increasing distance from Neptune | |||||
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| Triton | |||||
| Irregular |
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Natural satellites of the Solar System | ||
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| Minor-planet moons | ||
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