(136557) Neleus
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Asteroid (136557) Neleus |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Jupiter Trojan (L 4 ) |
| Major semi-axis | 5,2009 AU |
| eccentricity | 0.0640 |
| Perihelion - aphelion | 4.8682 AU - 5.5335 AU |
| Inclination of the orbit plane | 9.9632 ° |
| Length of the ascending node | 277.7936 ° |
| Argument of the periapsis | 163.3157 ° |
| Sidereal period | 11.86 a |
| Physical Properties | |
| Absolute brightness | 12.6 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 25, 1973 |
| Another name | 5214 T-2 , 2002 GE 50 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(136557) Neleus is an asteroid belonging to the group of Jupiter Trojans . This describes asteroids that orbit the sun on the Lagrange points on the orbit of the planet Jupiter . It is assigned to the Lagrange point L 4 , that is (136557) Neleus is running 60 ° ahead of Jupiter in its orbit around the sun.
The asteroid was discovered on September 25, 1973 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery was made during the 2nd Trojan survey, during which Tom Gehrels surveyed field plates recorded with the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 13 years after the start of the Palomar-Leiden- Surveys .
According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic investigation by Gianluca Masi , Sergio Foglia and Richard P. Binzel at (136557) Neleus assumed a dark surface, so it could, roughly speaking, be around trade a C asteroid .
(136557) Neleus was named after Neleus , the father of Nestor (after whom the asteroid (659) Nestor is named). Trojans running ahead are named after Greek heroes. It was named on December 12, 2008. On April 28, 2008, an impact crater on Saturn's moon Tethys was named after Neleus: Tethys crater Neleus .
Web links
- (136557) Neleus in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (136557) Neleus in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances of (136557) Neleus according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ^ Gianluca Masi, Sergio Foglia, Richard P. Binzel: Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog . (English)
- ↑ subdivision of asteroids to S-types, C-types and V-types (English)
- ↑ The Tethyscrater Neleus in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS (English)