1207 Ostenia
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Light-curve-based 3D- model of 1207 Ostenia
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| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 15 November 1931 |
| Designations | |
| MPC designation | 1207 Ostenia |
|
Named after
|
Hans Osten (amateur astronomer)[2] |
| 1931 VT · 1959 EF1 | |
| main-belt · Eos [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.87 yr (30,633 days) |
| Aphelion | 3.2793 AU |
| Perihelion | 2.7642 AU |
| 3.0217 AU | |
| Eccentricity | 0.0852 |
| 5.25 yr (1,919 days) | |
| 336.74° | |
| Inclination | 10.362° |
| 20.130° | |
| 43.396° | |
| Physical characteristics | |
| Dimensions | 22.93 km[4] 21.92±0.63 km[5] 23.05 km (derived)[3] |
| 9.073 h[6] 7.7 h[7] 8.4 h[8] 9.07129 h[9] 9.07129±0.00005 h[10] |
|
| 0.1338[4] 0.176±0.024[5] 0.1591 (derived)[3] |
|
| S [3] | |
| 10.8 | |
1207 Ostenia, provisional designation 1931 VT, is a stony asteroid from the outer region of the asteroid belt, about 23 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany on 15 November 1931.[11]
The S-type asteroid is a member of the Eos family, thought to have formed from a catastrophic collision of its parent body resulting in more than 4,000 known members of the family. It orbits the Sun at a distance of 2.8–3.3 AU once every 5 years and 3 months (1,919 days). Its orbit shows an eccentricity of 0.09 and is tilted by 10 degrees to the plane of the ecliptic. It has an albedo of 0.13–0.18, according to the space-based surveys carried out by the Infrared Astronomical Satellite, IRAS, and the Wide-field Infrared Survey Explorer missions.[4][5]
Photometric observations of the asteroid during 2006 at the Palmer Divide Observatory in Colorado Springs, Colorado (see § External links), were used to generate a light-curve with a period of 9.073±0.004 hours and a variation in brightness of 0.60±0.02 magnitude.[6] Subsequent measurements in 2009 and 2011 confirmed the rotation period to be 9.07 hours[9][10] while two older observations made in the 1970s gave significant shorter periods of 7.7 and 8.4 hours, respectively.[7][8]
The minor planet was named after Hans Osten (1875–1936) a German amateur astronomer, orbit computer and business man.[2] As a non-professional, Osten attracted attention with his precises calculations of comets and asteroids. He is known for calculating the orbit of 447 Valentine, taking into account perturbations by all major planets with such precision, that it was considered exemplary in the astronomical community. Osten received the silver Leibniz Medal in 1911.[12]
References
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- ↑ 10.0 10.1 Lua error in package.lua at line 80: module 'strict' not found.
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External links
- The Palmer Divide Observatory: Tour given by Brian Warner on YouTube (time 4:03 min.)
- 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
- 1207 Ostenia at the JPL Small-Body Database
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