1087 Arabis
1087 Arabis /ˈærəbɪs/ is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was iscovered by Karl Reinmuth at the Heidelberg Observatory in 1927 and assigned the provisional designation 1927 RD. The asteroid was named after the flowering plant Arabis (rockcress).
Lightcurve-based 3D-model of Arabis | |
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 2 September 1927 |
| Designations | |
MPC designation | (1087) Arabis |
| Pronunciation | /ˈærəbɪs/ |
Named after | Arabis (flowering plant) |
Alternative designations | 1927 RD · 1973 LB A917 UE |
Minor planet category | main-belt · (outer) Eos |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.40 yr (32,655 days) |
| Aphelion | 3.2984 AU |
| Perihelion | 2.7300 AU |
Semi-major axis | 3.0142 AU |
| Eccentricity | 0.0943 |
Orbital period (sidereal) | 5.23 yr (1,911 days) |
Mean anomaly | 12.959° |
Mean motion | 0° 11m 17.88s / day |
| Inclination | 10.061° |
Longitude of ascending node | 30.425° |
| 25.793° | |
| Physical characteristics | |
| Dimensions | 31.67 km (derived) 31.75±2.5 km 36.97±0.50 km 37.498±0.493 km 45.625±0.588 km 47.98±0.80 km |
Synodic rotation period | 5.794 h 5.794995±0.000002 h 5.79500±0.00001 h 5.79501±0.00005 h 5.797±0.001 h |
| 0.098±0.015 0.1031±0.0150 0.171±0.006 0.2137 (derived) 0.2248±0.040 | |
| Tholen = S B–V = 0.823 U–B = 0.370 | |
| 9.73 · 9.75±0.26 · 9.79 | |
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