1447 Utra
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 26 January 1938 |
| Designations | |
| 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 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 74.13 yr (27077 days) |
| Aphelion | 2.6403 AU (394.98 Gm) |
| Perihelion | 2.4288 AU (363.34 Gm) |
| 2.5346 AU (379.17 Gm) | |
| Eccentricity | 0.041726 |
| 4.04 yr (1473.8 d) | |
| 187.74° | |
| 0° 14m 39.336s / day | |
| Inclination | 4.7865° |
| 35.529° | |
| 64.308° | |
| Earth MOID | 1.44857 AU (216.703 Gm) |
| Jupiter MOID | 2.41359 AU (361.068 Gm) |
| TJupiter | 3.443 |
| 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,[a] 257 h (10.7 d)[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[a] 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
- ^ a b 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
- ^ a b c "JPL Small-Body Database Browser: 1447 Utra (1938 BB)" (2015-07-12 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
- ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1447) Utra. Springer Berlin Heidelberg. p. 116. ISBN 978-3-540-29925-7. Retrieved November 2015.
{{cite book}}: Check date values in:|accessdate=(help) - ^ a b c d "LCDB Data for (1447) Utra". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015.
{{cite journal}}: Check date values in:|access-date=(help) - ^ "1447 Utra (1938 BB)". Minor Planet Center. Retrieved November 2015.
{{cite web}}: Check date values in:|accessdate=(help)
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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