1691 Oort
.png) Light-curve-based 3D-model of 1691 Oort | |
| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth I. Groeneveld |
| Discovery site | Heidelberg Obs. |
| Discovery date | 9 September 1956 |
| Designations | |
| 1691 Oort | |
Named after | Jan Oort (astronomer)[2] |
| 1956 RB · 1945 TD 1947 DA · 1950 PZ 1950 RU · 1951 XW 1955 MW · 1956 SD 1964 DA · A917 TD | |
| main-belt · Themis [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 70.42 yr (25720 days) |
| Aphelion | 3.7154 AU (555.82 Gm) |
| Perihelion | 2.6161 AU (391.36 Gm) |
| 3.1658 AU (473.60 Gm) | |
| Eccentricity | 0.17362 |
| 5.63 yr (2057.4 d) | |
| 134.96° | |
| 0° 10m 29.928s / day | |
| Inclination | 1.0848° |
| 174.49° | |
| 232.89° | |
| Earth MOID | 1.62495 AU (243.089 Gm) |
| Jupiter MOID | 1.67879 AU (251.143 Gm) |
| TJupiter | 3.180 |
| Physical characteristics | |
| Dimensions | 37.37±0.74 km[4] 33.163±0.534 km[5] 27.13 km (calculated)[3] |
| 10.2705 h (0.42794 d)[1][6] 10.2684±0.0005 h[7] | |
| 0.053±0.002[4] 0.0672±0.0150[5] 0.10 (assumed)[3] | |
| B–V = 0.682 U–B = 0.316 Tholen = CU [1] C [3] | |
| 10.95 | |
1691 Oort, provisional designation 1956 RB, is a dark asteroid from the outer region of the asteroid belt, roughly 30 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth and Dutch astronomer Ingrid van Houten-Groeneveld at Heidelberg Observatory in south-west Germany on 9 September 1956.[8]
The carbonaceous C-type asteroid, classified as CU-type in the Tholen taxonomy, orbits the Sun at a distance of 2.6–3.7 AU once every 5 years and 8 months (2,060 days). Its orbit shows an eccentricity of 0.17 and is nearly coplanar to the plane of the ecliptic, with an orbital inclination of only 1 degree.[1] It has a well-defined rotation period of 10.27 hours[6][7] and an albedo of 0.05–0.07 determined by the Akari and WISE/NEOWISE surveys.[4][5]
It was named in honor of Dutch astronomer Jan Oort (1900–1992), director of the Leiden Observatory (1945–1970), president of the International Astronomical Union (1958–1961), and a well-known authority on stellar statistics and galactic structure.[2] He overturned the idea that the Sun was at the center of the Milky Way. The Oort cloud, the outermost gravitationally bound region of the Solar System, was also named after him.
References
- ^ a b c d e "JPL Small-Body Database Browser: 1691 Oort (1956 RB)" (2015-06-13 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
- ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1691) Oort. Springer Berlin Heidelberg. p. 134. ISBN 978-3-540-29925-7. Retrieved 10 November 2015.
- ^ a b c d "LCDB Data for (1691) Oort". Asteroid Lightcurve Database (LCDB). Retrieved 10 November 2015.
- ^ a b c Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; 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 10 November 2015.
- ^ a b c Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; 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 10 November 2015.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1691) Oort". Geneva Observatory. Retrieved 10 November 2015.
- ^ a b Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R.; et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy & Astrophysics. 559: 19. arXiv:1309.4296. Bibcode:2013A&A...559A.134H. doi:10.1051/0004-6361/201321993. Retrieved 10 November 2015.
- ^ "1691 Oort (1956 RB)". Minor Planet Center. Retrieved 10 November 2015.
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
- 1691 Oort at the JPL Small-Body Database
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