(8585) Purpurea
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Asteroid (8585) Purpurea |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Major semi-axis | 3.2179 AU |
| eccentricity | 0.1677 |
| Perihelion - aphelion | 2.6784 AU - 3.7574 AU |
| Inclination of the orbit plane | 9.5236 ° |
| Length of the ascending node | 358.3974 ° |
| Argument of the periapsis | 232.0510 ° |
| Time of passage of the perihelion | December 14, 2015 |
| Sidereal period | 5.77 a |
| Mean orbital velocity | 16.63 km / s |
| Physical Properties | |
| Medium diameter | 16.823 (± 0.200) km |
| Albedo | 0.045 (± 0.008) |
| Absolute brightness | 12.4 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 24, 1960 |
| Another name | 2025 PL , 1992 EQ 21 |
| 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. | |
(8585) Purpurea is an asteroid of the outer main belt , which 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 mean diameter of the asteroid was calculated to be 16.823 (± 0.200) km .
According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel at (8585) Purpurea assumed a dark surface, so it could, roughly speaking, be trade a C asteroid . The albedo was actually later calculated to be 0.045 (± 0.008).
(8585) Purpurea is named after the purple heron , whose scientific name is Ardea purpurea . At the time the asteroid was named on February 2, 1999, the purple heron was on the Dutch Red List of Endangered Species . The first letters of the asteroids (8585) to ( 8600 ) form the phrase Per aspera ad astra .
Web links
- (8585) Purpurea in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8585) Purpurea 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 (8585) Purpurea 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)