1946 Walraven
| Discovery [1] | |
|---|---|
| Discovered by | H. van Gent |
| Discovery site | Johannesburg Obs. (Leiden Southern Station) |
| Discovery date | 8 August 1931 |
| Designations | |
| MPC designation | 1946 Walraven |
|
Named after
|
Theodore Walraven (astronomer)[2] |
| 1931 PH · 1952 PB 1959 RE1 · 1966 TC 1972 JE1 |
|
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.14 yr (30,732 days) |
| Aphelion | 2.8335 AU |
| Perihelion | 1.7530 AU |
| 2.2933 AU | |
| Eccentricity | 0.2355 |
| 3.47 yr (1,269 days) | |
| 15.680° | |
| Inclination | 8.1629° |
| 17.274° | |
| 339.77° | |
| Physical characteristics | |
| Dimensions | 9.205±0.109 km[4] 11.83 km (calculated)[3] |
| 10.223 h[5] 10.22±0.02 h[6] |
|
| 0.3622±0.0670[4] 0.20 (assumed)[3] |
|
| S [3] | |
| 12.0 | |
1946 Walraven, provisional designation 1931 PH, is a stony asteroid from the inner regions of the asteroid belt. It was discovered by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa on 8 August 1931.[7]
The S-type asteroid measures about 10 kilometers in diameter. It orbits the Sun at a distance of 1.8–2.8 AU once every 3.47 years (1,269 days). It has a rather long rotation period of 10.2 hours.[5][6] Its geometric albedo is 0.36 and 0.2, according to preliminary results from the NEOWISE mission and assumptions made by the Light Curve Database project, respectively.[3][4] For a main-belt asteroid, Walraven shows a relatively high eccentricity of 0.23. Its orbit is inclined by 8 degrees to the plane of the ecliptic.[1]
The asteroid was named in honor of astronomer and pioneer in optical instrumentation and precision photometry, Theodore Walraven (1916–2008),[8] who was a professor at the Leiden University and for many years resident astronomer at the former Leiden Southern Station near Hartbeespoortdam, South Africa. He constructed special photometers for the telescopes at the station, including the 5-color photometer for which he developed the Walraven photometric system.[2]
References
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- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 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 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.
- ↑ 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 Geneve, Raoul Behrend
- 1946 Walraven at the JPL Small-Body Database
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