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Laomedeia, or Neptune XII, is a prograde irregular satellite of Neptune. It was discovered by Matthew J. Holman, et al. on August 13, 2002.[1] Prograde motion is the motion of a planetary body in a direction similar to that of other bodies within its system, and is sometimes called direct motion, especially in astrology. ...
In astronomy, an irregular satellite is a natural satellite following a distant, inclined, often retrograde orbit and believed to be captured as opposed to a regular satellite, formed in situ. ...
Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ...
Matthew J. Holman is a Smithsonian Astrophysicist and lecturer at Harvard University. ...
August 13 is the 225th day of the year in the Gregorian Calendar (226th in leap years), with 140 days remaining. ...
For album titles with the same name, see 2002 (album). ...
It orbits Neptune at a distance of about 23,571,000 km and is about 42 kilometers in diameter (assuming albedo of 0.04).[2]
- Eccentricity: 0.381
- Orbital inclination: 37.7° (to the ecliptic)[2]
See also In astronomy, an irregular satellite is a natural satellite following a distant, inclined, often retrograde orbit and believed to be captured as opposed to a regular satellite, formed in situ. ...
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References - ^ M. Holman, JJ Kavelaars, B. Gladman, Grav, Tommy; Gladman, Brett J; Fraser, Wesley C; Milisavljevic, Dan; Nicholson, Philip D; Burns, Joseph A; Carruba, Valerio; Petit, Jean-Marc; Rousselot, Philippe; Mousis, Oliver; Marsden, Brian G; Jacobson, Robert A Discovery of five irregular moons of Neptune, Nature, 430 (2004), pp. 865-867. Final preprint(pdf)
- ^ a b Scott S. Sheppard, David C. Jewitt, Jan Kleyna A Survey for "Normal" Irregular Satellites Around Neptune: Limits to Completeness,The Astronomical Journal, 132 (2006), pp. 171–176. Preprint.
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