1031 Arctica
1031 Arctica, provisional designation 1924 RR, is a dark asteroid from the outer region of the asteroid belt, approximately 75 kilometers in diameter. It was discovered on 6 June 1924, by Soviet−Russian astronomer Sergey Belyavsky at Simeiz Observatory on the Crimean peninsula. It was named for the Arctic Sea.
| Discovery | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 6 June 1924 |
| Designations | |
MPC designation | (1031) Arctica |
| Pronunciation | /ˈɑːrtɪkə/ |
Named after | Arctic Ocean |
Alternative designations | 1924 RR · A910 VB A913 JA |
Minor planet category | main-belt · (outer) |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.59 yr (33,820 days) |
| Aphelion | 3.2208 AU |
| Perihelion | 2.8767 AU |
Semi-major axis | 3.0487 AU |
| Eccentricity | 0.0564 |
Orbital period (sidereal) | 5.32 yr (1,944 days) |
Mean anomaly | 242.71° |
Mean motion | 0° 11m 6.72s / day |
| Inclination | 17.634° |
Longitude of ascending node | 218.92° |
| 307.14° | |
| Physical characteristics | |
| Dimensions | 73.83±20.13 km 74.78±19.68 km 75.400±0.497 km 75.47±1.5 km (IRAS:21) 75.784±1.399 km 77.28±1.05 km 87.61±0.64 km |
Synodic rotation period | 51.0 h 51.0±0.5 h 51±2 h |
| 0.035±0.004 0.04±0.01 0.04±0.03 0.044±0.001 0.0461±0.0046 0.0465±0.002 (IRAS:21) | |
| B–V = 0.680 U–B = 0.325 Tholen = CX: · CX: | |
| 9.51 · 9.56 | |
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