3133 Sendai
| Discovery [1] | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 4 October 1907 |
| Designations | |
| MPC designation | 3133 Sendai |
|
Named after
|
Sendai (Japanese city)[2] |
| A907 TC · 1968 TO 1973 DN · 1981 UX 1984 QG1 · A907 XA |
|
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.77 yr (39,364 days) |
| Aphelion | 2.5311 AU |
| Perihelion | 1.8299 AU |
| 2.1805 AU | |
| Eccentricity | 0.1607 |
| 3.22 yr (1,176 days) | |
| 159.62° | |
| Inclination | 6.5664° |
| 37.164° | |
| 358.38° | |
| Physical characteristics | |
| Dimensions | 8.323±0.066 km[4] 7.25±0.30 km[5] 7.47 km (calculated)[3] |
| 5.776±0.005 h[lower-alpha 1] 5.7491±0.0008 h[6] |
|
| 0.2131±0.0373[4] 0.307±0.039[5] 0.24 (assumed)[3] |
|
| S [3] | |
| 12.8[1] | |
3133 Sendai, provisional designation A907 TC, is a stony asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by German astronomer August Kopff at Heidelberg Observatory, southern Germany, on 4 October 1907.[7]
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.8–2.5 AU once every 3 years and 3 months (1,176 days). Its orbit is tilted by 7 degrees to the plane of the ecliptic and shows an eccentricity of 0.16.[1] In 2010, two photmetric light-curve observations by the Palomar Transient Factory and by amateur astronomer Ralph Megna at Goat Mountain Astronomical Research Station (G79) have rendered a rotation period of 5.78 and 5.75 hours, respectively.[lower-alpha 1][6]
According to the surveys carried out by the U.S. Wide-field Infrared Survey Explorer and its NEOWISE mission, the asteroid's surface has an albedo of 0.21[4] and 0.31,[5] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an intermediate albedo of 0.24, which is identical to the albedo of the Flora family's namesake, the asteroid 8 Flora.[3]
The minor planet is named for the biggest city in northeastern Japan, Sendai, home of Tôhuku University and several other institutes of higher learning, sometimes called the “Heidelberg of the East”. The Sendai Astronomical Observatory, established in 1955 at the urging of the Sendai Amateur Astronomical Association, has an active program for astrometric observations of comets and has discovered several minor planets.[2]
References
- ↑ 1.0 1.1 Megna (2011) web: rotation period 5.776±0.005 hours with a brightness amplitude of 0.19 mag. Light-curve chart at Ralph Megna's website and summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (3133) Sendai.
- ↑ 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.
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External links
- Ralph Megna, Ligh-curves, website
- 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
- 3133 Sendai at the JPL Small-Body Database
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