7526 Ohtsuka
| Discovery [1] | |
|---|---|
| Discovered by | T. Urata |
| Discovery site | Oohira Station |
| Discovery date | 2 January 1993 |
| Designations | |
| 7526 Ohtsuka | |
Named after | Katsuhito Ohtsuka (astronomer, curator)[2] |
| 1993 AA · 1953 XV 1980 TD13 · 1980 VU3 1984 YK2 | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.03 yr (22,657 days) |
| Aphelion | 3.1192 AU |
| Perihelion | 1.8107 AU |
| 2.4649 AU | |
| Eccentricity | 0.2654 |
| 3.87 yr (1,414 days) | |
| 41.970° | |
| Inclination | 4.2067° |
| 232.87° | |
| 151.00° | |
| Physical characteristics | |
| Dimensions | 9.79±0.44 km[4] 7.654±0.299 km[5] 6.64±0.65 km[6] 4.71 km (calculated)[3] |
| 7.109±0.001 h[7] | |
| 0.062±0.006[4] 0.0911±0.0083[5] 0.110±0.031[6] 0.20 (assumed)[3] | |
| S [3] | |
| 14.0[1] 13.70[4] 13.8[5] 13.90[6] | |
7526 Ohtsuka, provisional designation 1993 AA, is a stony asteroid from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered by Japanese astronomer Takeshi Urata at Nihondaira Observatory Oohira Station, Japan, on 2 January 1993.[8]
The S-type asteroid orbits the Sun at a distance of 1.8–3.1 AU once every 3 years and 10 months (1,414 days). Its orbit shows an eccentricity of 0.27 and an inclination of 4 degrees from the plane of the ecliptic.[1] A photometric light-curve analysis in 2007 rendered a rotation period of 7.109±0.001 hours with a brightness amplitude of 0.16 in magnitude (U=3-).[7]
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid has an albedo in the range of 0.06 to 0.11 with a diameter between 6.6 and 9.8 kilometers.[4][5][6] The Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.20 and calculates and much smaller diameter of 4.7 kilometers.[3]
The minor planet was named after Japanese astronomer Katsuhito Ohtsuka (b. 1959), also curator of the Tokyo Meteor Network and its meteorite collection. Ohtsuka studies the dynamics of small Solar System bodies, in particular 3200 Phaethon and 96P/Machholz with their complex members. A dynamical relationship between Phaethon and (155140) 2005 UD was discovered by him in 2005.[8]
References
- ^ a b c d "JPL Small-Body Database Browser: 7526 Ohtsuka (1993 AA)" (2015-12-20 last obs.). Jet Propulsion Laboratory. Retrieved 7 February 2016.
- ^ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9473) Ghent. Springer Berlin Heidelberg. p. 693. ISBN 978-3-540-00238-3. Retrieved 7 February 2016.
- ^ a b c d e "LCDB Data for (7526) Ohtsuka". Asteroid Lightcurve Database (LCDB). Retrieved 7 February 2016.
- ^ a b c d 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 7 February 2016.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 7 February 2016.
- ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 7 February 2016.
- ^ a b Clark, Maurice (October 2008). "Asteroid Lightcurve Observations". The Minor Planet Bulletin. 35 (4): 152–154. Bibcode:2008MPBu...35..152C. ISSN 1052-8091. Retrieved 7 February 2016.
- ^ a b "7526 Ohtsuka (1993 AA)". Minor Planet Center. Retrieved 7 February 2016.
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 (5001)-(10000) – Minor Planet Center
- 7526 Ohtsuka at the JPL Small-Body Database
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