| Discovery[1] | |
|---|---|
| Discovered by | T. Urata |
| Discovery site | Oohira Stn. |
| 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 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.31 yr (23,123 days) |
| Aphelion | 3.1213AU |
| Perihelion | 1.8139 AU |
| 2.4676 AU | |
| Eccentricity | 0.2649 |
| 3.88yr (1,416 days) | |
| 194.19° | |
| Inclination | 4.2151° |
| 232.74° | |
| 151.48° | |
| Physical characteristics | |
| Dimensions | 4.71 km(calculated)[3] 6.64±0.65 km[4] 7.654±0.299 km[5][6] 9.79±0.44 km[7] 11.34±4.59 km[8] |
| 7.109±0.001h[9] | |
| 0.03±0.02[8] 0.062±0.006[7] 0.091±0.008[5][6] 0.110±0.031[4] 0.20(assumed)[3] | |
| S[3] | |
| 13.70[7] · 13.8[5] · 13.90[4] · 14.0[1] · 14.16[8] · 14.93±1.67[10] | |
7526 Ohtsuka, provisional designation1993 AA, is a stonyasteroid from the inner regions of theasteroid belt, approximately 7 kilometers in diameter. It was discovered by Japanese astronomerTakeshi Urata atNihondaira Observatory Oohira Station, Japan, on 2 January 1993. The asteroid was named after Japanese astronomerKatsuhito Ohtsuka.[2]
Ohtsuka orbits the Sun in theinner main-belt at a distance of 1.8–3.1 AU once every 3 years and 11 months (1,416 days). Its orbit has aneccentricity of 0.26 and aninclination of 4° with respect to theecliptic.[1] First observed as1953 XV atHeidelberg, the body'sobservation arc begins atPalomar in 1980.[2]
In September 2007, a rotationallightcurve ofOhtsuka was obtained from photometric observations by Maurice Clark at theMontgomery College inRockville, Maryland. Lightcurve analysis gave arotation period of7.109±0.001 hours with a brightness amplitude of 0.16magnitude (U=3-).[9]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Ohtsuka has analbedo in the range of 0.03 to 0.11 with a diameter between 6.64 and 11.34 kilometers.[5][4][7][8] TheCollaborative Asteroid Lightcurve Link, however assumes a standard albedo forstony asteroids of 0.20 and calculates and much smaller diameter of 4.7 kilometers.[3]
Thisminor planet was named after Japanese astronomer Katsuhito Ohtsuka (born 1959), also curator of theTokyo Meteor Network and its meteorite collection. Ohtsuka studies the dynamics of small Solar System bodies, in particular3200 Phaethon and96P/Machholz with their complex members. A dynamical relationship between Phaethon and(155140) 2005 UD was discovered by him in 2005.[2] The official naming citation was published by theMinor Planet Center on 12 July 2014 (M.P.C. 89076).[11]
