7526 Ohtsuka

7526 Ohtsuka
Discovery [1]
Discovered by T. Urata
Discovery site Oohira Station
Discovery date 2 January 1993
Designations
MPC designation 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

    1. 1 2 3 4 "JPL Small-Body Database Browser: 7526 Ohtsuka (1993 AA)" (2015-12-20 last obs.). Jet Propulsion Laboratory. Retrieved February 2016.
    2. ↑ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9473) Ghent. Springer Berlin Heidelberg. p. 693. ISBN 978-3-540-00238-3. Retrieved February 2016.
    3. 1 2 3 4 5 "LCDB Data for (7526) Ohtsuka". Asteroid Lightcurve Database (LCDB). Retrieved February 2016.
    4. 1 2 3 4 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 February 2016.
    5. 1 2 3 4 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. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved February 2016.
    6. 1 2 3 4 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. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved February 2016.
    7. 1 2 Clark, Maurice (October 2008). "Asteroid Lightcurve Observations". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 35 (4): 152–154. Bibcode:2008MPBu...35..152C. ISSN 1052-8091. Retrieved February 2016.
    8. 1 2 "7526 Ohtsuka (1993 AA)". Minor Planet Center. Retrieved February 2016.

    External links


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