1171 Rusthawelia
1171 Rusthawelia, provisional designation 1930 TA, is a large and dark background asteroid, approximately 72 kilometers (45 miles) in diameter, located in the outer regions of the asteroid belt. It was discovered on 3 October 1930, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, and was an unnoticed rediscovery of a lost minor planet then known as "Adelaide". As the asteroid was already named for Georgian poet Shota Rustaveli when the rediscovery was realized, its former designation was given to another asteroid instead, which is now known as 525 Adelaide. Rusthawelia is a primitive P-type asteroid and has a rotation period of 11 hours.
Shape model of Rusthawelia from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | S. Arend |
| Discovery site | Uccle Obs. |
| Discovery date | 3 October 1930 |
| Designations | |
MPC designation | (1171) Rusthawelia |
Named after | Shota Rustaveli (Georgian poet) |
Alternative designations | 1930 TA · 1926 AD 1926 FH · 1927 FC 1949 BT · A904 EB A913 TA |
Minor planet category | main-belt · (outer) background |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.85 yr (41,584 d) |
| Aphelion | 3.7970 AU |
| Perihelion | 2.5779 AU |
Semi-major axis | 3.1875 AU |
| Eccentricity | 0.1912 |
Orbital period (sidereal) | 5.69 yr (2,079 d) |
Mean anomaly | 175.66° |
Mean motion | 0° 10m 23.52s / day |
| Inclination | 3.0731° |
Longitude of ascending node | 121.78° |
| 290.57° | |
| Physical characteristics | |
Mean diameter | 68.67±16.71 km 70.13±2.3 km 70.216±1.560 km 70.98±2.42 km 72.09±1.19 km 72.38±20.19 km 82.229±1.004 km |
| Mass | (1.81±0.20)×1018 kg |
Mean density | 9.66±1.45 g/cm3 |
Synodic rotation period | 10.80±0.01 h 10.98±0.01 h 11.013±0.003 h |
| 0.029±0.003 0.038±0.002 0.0393±0.0051 0.0394±0.003 0.04±0.02 | |
| Tholen = P · P B–V = 0.678 U–B = 0.255 | |
| 9.89 9.90 9.94±0.16 | |
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