1691 Oort
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Light-curve-based 3D-model of 1691 Oort
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| Discovery [1] | |
|---|---|
| Discovered by | K. Reinmuth I. Groeneveld |
| Discovery site | Heidelberg Obs. |
| Discovery date | 9 September 1956 |
| Designations | |
| MPC designation | 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 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 69.66 yr (25,443 days) |
| Aphelion | 3.7160 AU |
| Perihelion | 2.6216 AU |
| 3.1688 AU | |
| Eccentricity | 0.1726 |
| 5.64 yr (2,060 days) | |
| 99.783° | |
| Inclination | 1.0824° |
| 174.47° | |
| 233.13° | |
| Physical characteristics | |
| Dimensions | 37.37±0.74 km[4] 33.163±0.534 km[5] 27.13 km (caculated)[3] |
| 10.2705 h[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
- ↑ 1.0 1.1 1.2 1.3 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 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 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
- 1691 Oort at the JPL Small-Body Database
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