1473 Ounas
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 22 October 1938 |
| Designations | |
| MPC designation | 1473 Ounas |
|
Named after
|
Ounas river (in Finland)[2] |
| 1938 UT · 1950 NZ 1950 PB1 |
|
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 76.58 yr (27,971 days) |
| Aphelion | 3.1849 AU |
| Perihelion | 1.9627 AU |
| 2.5738 AU | |
| Eccentricity | 0.2374 |
| 4.13 yr (1,508 days) | |
| 236.59° | |
| Inclination | 13.649° |
| 216.52° | |
| 129.44° | |
| Physical characteristics | |
| Dimensions | 17.58 km 20.032±0.079 km[4] 17.62 km (derived)[3] |
| 139.1 h[5][6] | |
| 0.1089 0.0841±0.0080[4] 0.1189 (derived)[3] |
|
| S [3] | |
| 11.7 | |
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1473 Ounas, provisional designation 1938 UT, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, about 18 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland on 22 October 1938.[7]
The S-type asteroid orbits the Sun at a distance of 2.0–3.2 AU once every 4.13 years (1,508 days). Its orbit shows an eccentricity of 0.24 and is tilted by 14 degrees to the plane of the ecliptic. It has a very long rotation period of 139.100 hours[5][6] and an albedo of 0.11.[4]
The minor planet was named after the Ounas river, one of the principal rivers in Finland.[2]
References
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<references />, or <references group="..." />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
- 1473 Ounas at the JPL Small-Body Database
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