1481 Tübingia
Main-belt asteroid
From Wikipedia, the free encyclopedia
1481 Tübingia, provisional designation 1938 DR, is a dark asteroid from the outer region of the asteroid belt, approximately 34 kilometers in diameter. It was discovered on 7 February 1938, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named for the German city of Tübingen.[12]
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 7 February 1938 |
| Designations | |
| (1481) Tubingia | |
Named after | Tübingen (German city)[2] |
| 1938 DR · 1930 UL 1933 FT1 · 1933 FY1 1935 SY1 · 1938 CN 1938 ES · 1939 LD 1941 WF · 1950 OQ 1955 LA · 1959 GY A907 GQ · A912 FB | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.28 yr (30,783 days) |
| Aphelion | 3.1492 AU |
| Perihelion | 2.8896 AU |
| 3.0194 AU | |
| Eccentricity | 0.0430 |
| 5.25 yr (1,916 days) | |
| 283.84° | |
| 0° 11m 16.44s / day | |
| Inclination | 3.5098° |
| 353.74° | |
| 312.18° | |
| Physical characteristics | |
| Dimensions | 33.26±1.7 km (IRAS:5)[4] 33.770±0.139 km[5] 35.20±0.73 km[6] 37.316±0.332 km[7] 40.12±0.51 km[8] |
| 24 h[9] 160±20 (outdated)[10] | |
| 0.082±0.002[8] 0.0920±0.0143[7] 0.104±0.020 [6][5] 0.1167±0.013 (IRAS:5)[4] 0.1168 (SIMPS)[3] | |
| C[3] BâV = 0.920[1] UâB = 0.370[1] | |
| 10.34[1][4][6][8] · 10.35[3][7][10] · 10.87±0.68[11] | |
Orbit and classification
Tübingia orbits the Sun in the outer main-belt at a distance of 2.9â3.1 AU once every 5 years and 3 months (1,916 days). Its orbit has an eccentricity of 0.04 and an inclination of 4° with respect to the ecliptic.[1] It was first identified as A907 GQ at the U.S. Taunton Observatory in 1907. The asteroid's first used observation was made at Heidelberg in 1933, extending the body's observation arc by 5 years prior to its official discovery observation.[12]
Physical characteristics
The asteroid has been characterized as a C-type asteroid.[3]
Rotation period
In October 2008, a rotational lightcurve of Tübingia was obtained form photometric observations by James W. Brinsfield at Via Capote Observatory (G69) in California. Analysis gave a longer-than average rotation period of 24 hours with a brightness variation of 0.20 magnitude (U=2).[9] The result supersedes a much longer period obtained in the 1980s.[10]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tübingia measures between 33.26 and 40.12 kilometers in diameter, and its surface has an albedo of 0.082 to 0.117.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link adopts the results from IRAS, that is, an albedo of 0.117 and a diameter of 33.26 kilometers using an absolute magnitude of 10.35.[3]
Naming
This minor planet was named after Tübingen, city in southern Germany and workplace of astronomer Johannes Kepler.[2] The official naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909).[13]
