9423 Abt
| Discovery [1] | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 12 January 1996 |
| Designations | |
| MPC designation | 9423 Abt |
|
Named after
|
Helmut Abt (astronomer)[2] |
| 1996 AT7 · 1974 DU 1981 US15 · 1983 CK8 1990 VH15 · 1992 DP2 |
|
| main-belt · (middle) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 41.57 yr (15,185 days) |
| Aphelion | 2.9671 AU |
| Perihelion | 2.4188 AU |
| 2.6930 AU | |
| Eccentricity | 0.1017 |
| 4.42 yr (1,614 days) | |
| 295.72° | |
| Inclination | 8.8477° |
| 106.17° | |
| 219.48° | |
| Physical characteristics | |
| Dimensions | 12.84±0.86 km[4] 12.690±0.145 km[5] 13.29 km (calculated)[3] |
| 3.281±0.005 h[6] 3.2766±0.0003 h[7] |
|
| 0.141±0.020[4] 0.1319±0.0117[5] 0.10 (assumed)[3] |
|
| S [3] | |
| 12.5[1] | |
9423 Abt, provisional designation 1996 AT7, is a stony asteroid from the middle region of the asteroid belt, about 13 kilometers in diameter. It was discovered by the U.S. Spacewatch project of the University of Arizona at Kitt Peak National Observatory, on 12 January 1996.[8]
The S-type asteroid orbits the Sun at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,614 days). Its orbit shows an eccentricity of 0.10 and is tilted by 9 degrees to the plane of the ecliptic.[1] A photometric light-curve observation at Hunters Hill Observatory, Australia, in 2006 gave it a rotation period of 3.281±0.005 hours with a brightness amplitude of 0.30 in magnitude.[6] A second light-curve analysis took place at the Palomar Transient Factory survey in 2012, rendered a concurring period of 3.2766±0.0003 hours with an amplitude of 0.33 in magnitude.[7]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of the U.S Wide-field Infrared Survey Explorer, the asteroid's surface has an albedo of 0.14 and 0.13, respectively, while the Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.10, which is untypically low for stony bodies. Both, the space-based surveys and CALL agree closely on a diameter estimate in the range of 12.69 to 13.29 kilometers.[3][4][5]
The minor planet was named after American astronomer Helmut Abt (b. 1925), one of the founders of the discovering Kitt Peak National Observatory, after which the minor planet 2322 Kitt Peak is named. He is known for his fundamental studies of stellar characteristics, multiple stars and publication practices. As editor-in-chief, he lead The Astrophysical Journal into the current electronic age.[2]
References
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External links
- Helmut Abt, photographic archive, University of Arizona
- Helmut Abt, National Optical Astronomy Observatory
- 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 (5001)-(10000) – Minor Planet Center
- 9423 Abt at the JPL Small-Body Database
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