(8961) Schoenobaenus
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Asteroid (8961) Schoenobaenus |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Themis family |
| Major semi-axis | 3.2128 AU |
| eccentricity | 0.1336 |
| Perihelion - aphelion | 2.7835 AU - 3.6421 AU |
| Inclination of the orbit plane | 1.1229 ° |
| Length of the ascending node | 38.3606 ° |
| Argument of the periapsis | 151.5197 ° |
| Time of passage of the perihelion | 20th October 2020 |
| Sidereal period | 5.76 a |
| Mean orbital velocity | 16.64 km / s |
| Physical Properties | |
| Medium diameter | 9.480 km (± 0.239) |
| Albedo | 0.071 (± 0.011) |
| Absolute brightness | 13.7 mag |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | September 24, 1960 |
| Another name | 2702 PL , 1978 WN 15 |
| 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. | |
(8961) Schoenobaenus 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 mean diameter of (8961) Schoenobaenus was calculated to be 9.480 km (± 0.239).
The asteroid belongs to the Themis family, a group of asteroids named after (24) Themis . According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel in (8961) Schoenobaenus assumed a dark surface, so it could, roughly speaking, be around trade a C asteroid . The asteroid's albedo actually indicates a rather dark surface at 0.071 (± 0.011).
(8961) Schoenobaenus is named after the reed warbler, whose scientific name is Acrocephalus schoenobaenus . At the time the asteroid was named on February 2, 1999, the reed warbler was on the Dutch Red List of Endangered Species .
Web links
- (8961) Schoenobaenus in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8961) Schoenobaenus 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 (8961) Schoenobaenus according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ Database with the assignment of 12,487 asteroids to asteroid groups (English)
- ^ 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)