1312 Vassar
| Discovery [1] | |
|---|---|
| Discovered by | G. van Biesbroeck |
| Discovery site | Yerkes Observatory |
| Discovery date | 27 July 1933 |
| Designations | |
| MPC designation | 1312 Vassar |
Named after |
Vassar College (Vassar Observatory)[2] |
|
1933 OT · 1944 QE A908 CD | |
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.54 yr (30147 days) |
| Aphelion | 3.7614 AU (562.70 Gm) |
| Perihelion | 2.4261 AU (362.94 Gm) |
| 3.0937 AU (462.81 Gm) | |
| Eccentricity | 0.21581 |
| 5.44 yr (1987.6 d) | |
| 32.513° | |
| 0° 10m 52.068s / day | |
| Inclination | 21.902° |
| 129.45° | |
| 261.31° | |
| Earth MOID | 1.53909 AU (230.245 Gm) |
| Jupiter MOID | 2.11804 AU (316.854 Gm) |
| Jupiter Tisserand parameter | 3.079 |
| Physical characteristics | |
| Dimensions |
36.28 km[1] 32.70±1.29 km[4] 36.32 km (derived)[3] |
Mean radius | 18.14±0.55 km |
| 7.932 h (0.3305 d)[lower-alpha 1][1] | |
|
0.0643±0.004[1] 0.081±0.007[4] 0.0703 (derived)[3] | |
| C [3] | |
| 10.7 | |
|
| |
1312 Vassar, provisional designation 1933 OT, is a carbonaceous asteroid from the outer region of the asteroid belt, about 36 kilometers in diameter. It was discovered by Belgian–American astronomer George Van Biesbroeck at the U.S Yerkes Observatory in Williams Bay, Wisconsin, on 27 July 1933.[5]
The dark C-type asteroid orbits the Sun at a distance of 2.4–3.8 AU once every 5 years and 5 months (1,989 days). Its orbit shows an eccentricity of 0.22 and is tilted by 22 degrees to the plane of the ecliptic. It has a rotation period of 7.9 hours[lower-alpha 1] and an albedo between 0.06 and 0.08, based on the surveys carried out by the Infrared Astronomical Satellite, IRAS, and the Japanese Akari satellite.[1][4]
The asteroid was named by American astronomer Maud Worcester Makemson (1891–1977) after the U.S Vassar College (formerly: Vassar Female College), located in New York state. Makemson, who computed the asteroid's orbit, was a teacher at the private elite school and director of its Vassar College Observatory.[2]
References
- 1 2 Higgins (2011) web: rotation period 7.932±0.002 hours with a brightness amplitude of 0.35 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1312) Vassar
- 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1312 Vassar (1933 OT)" (2015-10-10 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1312) Vassar. Springer Berlin Heidelberg. p. 107. ISBN 978-3-540-29925-7. Retrieved November 2015.
- 1 2 3 4 "LCDB Data for (1312) Vassar". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
- ↑ "1312 Vassar (1933 OT)". Minor Planet Center. Retrieved November 2015.
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
- 1312 Vassar at the JPL Small-Body Database
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