1245 Calvinia
1245 Calvinia (prov. designation: 1932 KF) is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 30 kilometers (19 miles) in diameter. It was discovered on 26 May 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The S-type asteroid is likely elongated and has a rotation period of 4.9 hours. It was named for the city of Calvinia in South Africa.
Shape model of Calvinia from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 26 May 1932 |
| Designations | |
MPC designation | (1245) Calvinia |
Named after | Calvinia (South African city) |
Alternative designations | 1932 KF · 1948 VT 1950 CP · A906 FB A914 YB · A916 DC A917 KE |
Minor planet category | main-belt · (outer) background · Koronis |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.59 yr (41,125 d) |
| Aphelion | 3.1302 AU |
| Perihelion | 2.6536 AU |
Semi-major axis | 2.8919 AU |
| Eccentricity | 0.0824 |
Orbital period (sidereal) | 4.92 yr (1,796 d) |
Mean anomaly | 137.36° |
Mean motion | 0° 12m 1.44s / day |
| Inclination | 2.8936° |
Longitude of ascending node | 151.72° |
| 208.24° | |
| Physical characteristics | |
Mean diameter | 26.84±3.5 km 29.751±0.204 km 30.444±0.137 km 30.95±0.78 km |
Synodic rotation period | 4.8523±0.0001 h |
| 0.214 0.2202 0.221 0.2713 | |
| Tholen = S B–V = 0.847 U–B = 0.474 | |
| 9.89 9.9 10.11±0.03 | |
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