1447 Utra
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 26 January 1938 |
| Designations | |
| MPC designation | 1447 Utra |
|
Named after
|
Utra (discoverer's birthplace)[2] |
| 1938 BB · 1936 SB 1951 KO · A918 FA |
|
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 73.39 yr (26,807 days) |
| Aphelion | 2.6407 AU |
| Perihelion | 2.4285 AU |
| 2.5346 AU | |
| Eccentricity | 0.0418 |
| 4.04 yr (1,474 days) | |
| 89.745° | |
| Inclination | 4.7864° |
| 35.531° | |
| 64.575° | |
| Physical characteristics | |
| Dimensions | 11.83±0.86 km[4] 12.634±0.103 km[5] 13.26±0.53 km[6] 13.58 km (calculated)[3] |
| 257±30 h[lower-alpha 1] | |
| 0.381±0.058[4] 0.3381±0.0591[5] 0.303±0.038[6] 0.20 (assumed)[3] |
|
| S [3] | |
| 11.7 | |
1447 Utra, provisional designation 1938 BB, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, about 13 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory on 26 January 1938.[7]
The S-type asteroid orbits the Sun at a distance of 2.4–2.6 AU once every 4.04 years (1,474 days). Its orbit shows an eccentricity of 0.04 and is tilted by 5 degrees to the plane of the ecliptic. It has a very long rotation period of 257±30 hours[lower-alpha 1] and an albedo of 0.38 and 0.30, according to the results from the Akari and Wide-field Infrared Survey Explorer missions, respectively.[4][5][6]
The minor planet was named after the northeastern Finnish town, Utra, birthplace of the discoverer.[2]
References
- ↑ 1.0 1.1 Martinez (2011) web: rotation period 257±30 hours with a brightness amplitude of 0.63 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1447) Utra
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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
- 1447 Utra at the JPL Small-Body Database
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