(7210) Darius
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Asteroid (7210) Darius |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Koronis family |
| Major semi-axis | 2.8339 AU |
| eccentricity | 0.0074 |
| Perihelion - aphelion | 2.8129 AU - 2.8549 AU |
| Inclination of the orbit plane | 3.0114 ° |
| Length of the ascending node | 124.5677 ° |
| Argument of the periapsis | 53.6215 ° |
| Sidereal period | 4.77 a |
| Mean orbital velocity | 17.68 km / s |
| Physical Properties | |
| Absolute brightness | 12.6 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 24, 1960 |
| Another name | 6555 PL , 1977 GB, 1987 FU 1 , 1989 UE 6 |
| 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. | |
(7210) Darius is an asteroid of the main outer belt that was discovered on September 24, 1960 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery came about as part of the Palomar-Leiden survey , during which Tom Gehrels examined field plates recorded at the University of Leiden with the 120 cm Oschin Schmidt telescope of the Palomar observatory .
The eccentricity of the asteroid is small with rounded up 0.0074, so that its orbit around the sun comes very close to an ideal circular orbit, similar to the eccentricity of the planet Venus (0.0068). It is significantly less than the earth's eccentricity (0.0167).
(7210) Darius is a member of the Koronis family, a group of asteroids named after (158) Koronis . The timeless (non- osculating ) orbital elements of (7210) Darius are almost identical to those of seven smaller ones, if one considers the absolute brightness of 14.2, 14.4, 15.4, 15.8, 16.3, 16, 0 and 17.1 compared to 12.6, asteroids: (11201) Talich , (55691) 3028 T-2 , (88045) 2000 VC 5 , (170751) 2004 BC 163 , (173801) 2001 SE 225 , (179322) 2001 WF 44 and (355068) 2006 SC 219 .
According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel at (7210) Darius assumed a light surface, so it could, roughly speaking, be around trade an S asteroid .
(7210) Darius is named after Darius I , a great king of the Persian Achaemenid Empire . The name was given on October 16, 1997. Darius is the Latin form of Darius . Darius I, often also called Darius the Great, is considered to be the most important great king of the ancient Persian Empire , alongside Cyrus II . The asteroid of the central main belt (7209) was named Cyrus after Cyrus II .
Web links
- (7210) Darius in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (7210) Darius in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances of (7210) Darius according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ^ 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)