1310 Villigera
| Discovery [1] | |
|---|---|
| Discovered by | Friedrich Schwassmann |
| Discovery site | Bergedorf Obs. |
| Discovery date | 28 February 1932 |
| Designations | |
| MPC designation | 1310 Villigera |
|
Named after
|
Walther Villiger (astronomer)[2] |
| 1932 DB · 1964 TC | |
| Mars-crosser [1][3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.63 yr (30,546 days) |
| Aphelion | 3.2431 AU |
| Perihelion | 1.5418 AU |
| 2.3924 AU | |
| Eccentricity | 0.3555 |
| 3.70 yr (1,352 days) | |
| 223.69° | |
| Inclination | 21.073° |
| 357.32° | |
| 88.711° | |
| Earth MOID | 0.7166 AU |
| Physical characteristics | |
| Dimensions | 15.24 km (calculated)[3] |
| 7.830 h[4] 7.834±0.001 h[5] |
|
| 0.20 (assumed)[3] | |
| B–V = 0.905 U–B = 0.445 Tholen = S S [3] |
|
| 11.45 | |
1310 Villigera, provisional designation 1932 DB, is a stony asteroid and large Mars-crosser from the innermost regions of the asteroid belt, about 15 kilometers in diameter. It was discovered by German astronomer Friedrich Schwassmann at Bergedorf Observatory in Hamburg, on 28 February 1932.[6]
The asteroid orbits the Sun at a distance of 1.5–3.2 AU once every 3 years and 8 months (1,352 days). Its orbit shows an eccentricity of 0.36 and is tilted by 21 degrees to the plane of the ecliptic. It has a rotation period of 7.83 hours[4][5] and an albedo of 0.20, as assumed by the Collaborative Asteroid Lightcurve Link (CALL), which is a typical value for a S-type asteroid.[3] However, without CALL's specific assumption about the body's spectral type and associated albedo, its diameter could by anywhere between 13 and 30 kilometers, for an albedo in the range of 0.05 to 0.25, based only on its absolute magnitude of 11.45.[7]
Other large Mars crossing minor planets include 132 Aethra (43 km), 323 Brucia (36 km), and 2204 Lyyli (25 km).
The asteroid was named in honour of Swiss astronomer Walther Villiger (1872–1938), discoverer of the minor planet 428 Monachia.[2]
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1310 Villigera at the JPL Small-Body Database
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