1272 Gefion
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 10 October 1931 |
| Designations | |
| (1272) Gefion | |
| Pronunciation | /ˈɡeɪfiɒn/ or /ˈɡɛfiɒn/ |
Named after | Gefjon (Norse mythology) |
| 1931 TZ1 · A917 SF | |
| main-belt · (middle) Gefion | |
| Adjectives | Gefionian /ɡɛfiˈoʊniən/ |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 99.50 yr (36,344 days) |
| Aphelion | 3.2076 AU |
| Perihelion | 2.3604 AU |
| 2.7840 AU | |
| Eccentricity | 0.1521 |
| 4.65 yr (1,697 days) | |
| 215.36° | |
| 0° 12m 43.92s / day | |
| Inclination | 8.4185° |
| 321.56° | |
| 3.6671° | |
| Physical characteristics | |
| Dimensions | 6.965±0.169 km 7.016±0.066 km 12.62 km (calculated) |
| 2.900±0.0012 h 3.087±0.0005 h | |
| 0.057 (assumed) 0.2489±0.0256 0.252±0.041 | |
| SMASS = Sl C (assumed) | |
| 12.785±0.005 (R) · 12.9 · 13.0 · 13.01±0.21 · 13.22 | |
1272 Gefion, provisional designation 1931 TZ1, is a stony asteroid and parent body of the Gefion family from the central region of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 10 October 1931, by astronomer Karl Reinmuth at the Heidelberg Observatory in Germany. The asteroid was named after Gefjon from Norse mythology.