11949 Kagayayutaka
| Discovery | |
|---|---|
| Discovered by |
K. Endate K. Watanabe |
| Discovery site | Kitami Obs. |
| Discovery date | 19 September 1993 |
| Designations | |
| MPC designation | 11949 Kagayayutaka |
|
Named after
|
Kagaya Yutaka (artist) |
| 1993 SD2 · 1998 QV62 | |
| main-belt · (outer) | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.14 yr (8,453 days) |
| Aphelion | 3.6333 AU |
| Perihelion | 2.5442 AU |
| 3.0887 AU | |
| Eccentricity | 0.1763 |
| 5.43 yr (1,983 days) | |
| 14.273° | |
| 0° 10m 53.76s / day | |
| Inclination | 7.6252° |
| 226.01° | |
| 249.41° | |
| Physical characteristics | |
| Dimensions |
22.28±6.88 km 23.21 km (calculated) |
| 3.96±0.03 h | |
| 0.057 (assumed) 0.708 |
|
| S · C | |
| 11.80 · 11.9 · 11.91±0.58 | |
11949 Kagayayutaka, provisional designation 1993 SD2, is an asteroid from the outer region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 19 September 1993, by Japanese amateur astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in eastern Hokkaidō, Japan.
The asteroid orbits the Sun at a distance of 2.5–3.6 AU once every 5 years and 5 months (1,983 days). Its orbit has an eccentricity of 0.18 and an inclination of 8° with respect to the ecliptic. As no precoveries were taken, the asteroid's observation arc starts with its discovery observation in September 1993.
The body is classified as both a C and S-type asteroid by the Collaborative Asteroid Lightcurve Link (CALL) and Pan-STARRS survey of magnitudes, respectively. According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 22.28 kilometers in diameter and its surface has a high albedo of 0.708, while CALL assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 23.21 kilometers.
A rotational light-curve was obtained for this asteroid from photometric observations by French astronomer René Roy in November 2015. It gave a provisional rotation period of 3.96±0.03 hours with a brightness variation of 0.28 in magnitude (U=3-).
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