Laomedeia

Laomedeia
	Laomedeia imaged by the Very Large Telescope's FORS1 imager in September 2002
Discovery
Discovered by	M.Holman; JJ Kavelaars; T. Grav; W. Fraser; D. Milisavljevic;
Discovery date	August 13, 2002
Designations
Designation	Neptune XII
Pronunciation	/ˌleɪəməˈdiːə/
Named after	Λαομέδεια Lāomedeia
Alternative names	S/2002 N 3
Adjectives	Laomedeian
Orbital characteristics
	Epoch 2003 Jun. 10.00 TT
Semi-major axis	23,613,000 km
Eccentricity	0.3969
Orbital period (sidereal)	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)
Albedo	0.04 (assumed)

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.

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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.

[1]
JPL (2011-07-21). "Planetary Satellite Discovery Circumstances". Jet Propulsion Laboratory. Retrieved 2011-10-24.
[2]
Green, Daniel W. E. (January 13, 2003). "Satellites of Neptune". IAU Circular. 8047. Retrieved 2011-10-24.
[3]
"Laomedian" in Otley (1828) Essays on the nature, causes and effects of national antipathies
[4]
Jacobson, R. A. (2008). "NEP078 – JPL satellite ephemeris". Planetary Satellite Mean Orbital Parameters. Retrieved 2009-09-23.
[5]
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.
[6]
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.

[JPL-Discoverers-1] [1]
JPL (2011-07-21). "Planetary Satellite Discovery Circumstances". Jet Propulsion Laboratory. Retrieved 2011-10-24.

[IAUC_8047-2] [2]
Green, Daniel W. E. (January 13, 2003). "Satellites of Neptune". IAU Circular. 8047. Retrieved 2011-10-24.

[3] [3]
"Laomedian" in Otley (1828) Essays on the nature, causes and effects of national antipathies

[JPL-Jacobson2008-4] [4]
Jacobson, R. A. (2008). "NEP078 – JPL satellite ephemeris". Planetary Satellite Mean Orbital Parameters. Retrieved 2009-09-23.

[SheppardJewittKleyna2006-5] [5]
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.

[HolmanKavelaarsGrav2004-6] [6]
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.

[6]

[1]

[2]

[3]

[4]

[5]

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References

External links

Discovery^[1]^[2]
Laomedeia imaged by the Very Large Telescope's FORS1 imager in September 2002
Discovered by	M.Holman JJ Kavelaars T. Grav W. Fraser D. Milisavljevic
Discovery date	August 13, 2002
Designations
Designation	Neptune XII
Pronunciation	/ˌleɪəməˈdiːə/
Named after	Λαομέδεια Lāomedeia
Alternative names	S/2002 N 3
Adjectives	Laomedeian^[3]
Orbital characteristics^[4]
Epoch 2003 Jun. 10.00 TT
Semi-major axis	23,613,000 km
Eccentricity	0.3969
Orbital period (sidereal)	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]