1252 Celestia
1252 Celestia, provisional designation 1933 DG, is a stony asteroid located in the central asteroid belt. It was discovered on 19 February 1933, by astronomer Fred Whipple at the Oak Ridge Observatory operated by the Harvard-Smithsonian Center for Astrophysics in Massachusetts, United States. The S-type asteroid has a rotation period of 10.6 hours and measures approximately 20 kilometers (12 miles) in diameter. It was named after the discoverer's mother, Celestia MacFarland Whipple.
| Discovery | |
|---|---|
| Discovered by | F. L. Whipple |
| Discovery site | Oak Ridge Obs. |
| Discovery date | 19 February 1933 |
| Designations | |
MPC designation | (1252) Celestia |
Named after | Celestia Whipple (discoverer's mother) |
Alternative designations | 1933 DG · 1934 PA1 |
Minor planet category | main-belt · (middle) Pallas · background |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.57 yr (31,254 d) |
| Aphelion | 3.2535 AU |
| Perihelion | 2.1350 AU |
Semi-major axis | 2.6943 AU |
| Eccentricity | 0.2076 |
Orbital period (sidereal) | 4.42 yr (1,615 d) |
Mean anomaly | 137.14° |
Mean motion | 0° 13m 22.44s / day |
| Inclination | 33.839° |
Longitude of ascending node | 140.91° |
| 63.589° | |
| Physical characteristics | |
Mean diameter | 17.39±1.6 km 19.037±0.304 km 20.36±0.69 km 21.542±0.155 km 21.56±0.95 km |
Synodic rotation period | 10.636 h |
| 0.167 0.1714 0.193 0.215 0.2573 | |
| Tholen = S SMASS = S B–V = 0.890 U–B = 0.425 | |
| 10.89 | |
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