1746 Brouwer
| Discovery [1] | |
|---|---|
| Discovered by | Indiana Asteroid Program |
| Discovery site | Goethe Link Obs. |
| Discovery date | 14 September 1963 |
| Designations | |
| MPC designation | 1746 Brouwer |
|
Named after
|
Dirk Brouwer (astronomer) [2] |
| 1963 RF · 1940 WE 1947 QA |
|
| main-belt (outer) · Hilda [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 75.30 yr (27503 days) |
| Aphelion | 4.7656 AU (712.92 Gm) |
| Perihelion | 3.1317 AU (468.50 Gm) |
| 3.9486 AU (590.70 Gm) | |
| Eccentricity | 0.20690 |
| 7.85 yr (2866.0 d) | |
| 216.59° | |
| Inclination | 8.3670° |
| 321.99° | |
| 47.551° | |
| Earth MOID | 2.13717 AU (319.716 Gm) |
| Jupiter MOID | 0.857162 AU (128.2296 Gm) |
| Physical characteristics | |
| Dimensions | 64.25 km [4] 61.50±1.80 km [5] |
|
Mean radius
|
32.125 ± 2.45 km |
| 19.8 h (0.83 d) [1][6] 19.88±0.05 h [lower-alpha 1] |
|
| 0.0448 [4] 0.051±0.003 [5] 0.05±0.01 [7] 0.0448 ± 0.008 [1] |
|
| B–V = 0.721 U–B = 0.227 Tholen = D D [3] |
|
| 9.95 | |
1746 Brouwer, provisional designation 1963 RF, is a dark, reddish Hildian asteroid from the outermost region of the asteroid belt, about 64 kilometers in diameter. It was discovered on September 14, 1963 by the Indiana Asteroid Program at the U.S. Goethe Link Observatory near Brooklyn, Indiana.[8]
The asteroid is a member of the Hilda family, a large group that orbits in resonance with the gas giant Jupiter and are thought to originate from the Kuiper belt. The body orbits the Sun at a distance of 3.1–4.8 AU once every 7 years and 10 months (2,867 days). Its orbit shows an eccentricity of 0.21 and is tilted by 8 degrees to the plane of the ecliptic. It has a rotation period of 19.8 hours.[6][lower-alpha 1] The reddish D-type asteroid has a low albedo of 0.05, based on observations made by the space-based IRAS, Akari and WISE/NEOWISE missions.[4][5][7]
It was named in honor of Dutch–American astronomer Dirk Brouwer (1902–1966). Originally at Leiden University and specialized in celestial mechanics, he became director of the Yale University Observatory and was the president of IAU's commission 20, Positions & Motions of Minor Planets, Comets & Satellites, from 1948 to 1955.[2]
References
- ↑ 1.0 1.1 Slyusarev (2012) web: rotation period 19.88±0.05 hours with a brightness amplitude of 0.21. Summary figures at Asteroid Lightcurve Database for (1746) Brouwer
- ↑ 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 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
- 1746 Brouwer at the JPL Small-Body Database
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