925 Alphonsina
925 Alphonsina, provisional designation 1920 GM, is a stony Hansian asteroid from the central region of the asteroid belt, approximately 58 kilometers (36 miles) in diameter. It was discovered on 13 January 1920, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain. The S-type asteroid has a rotation period of 7.88 hours. It was named for the Spanish Kings Alfonso X and Alfonso XIII.
| Discovery | |
|---|---|
| Discovered by | J. Comas Solà |
| Discovery site | Fabra Obs. |
| Discovery date | 13 January 1920 |
| Designations | |
MPC designation | (925) Alphonsina |
| Pronunciation | /ælfɒnˈsaɪnə/ |
Named after | Alfonso X and Alfonso XIII (Kings of Castile and Spain) |
Alternative designations | 1920 GM · A902 ED |
Minor planet category | main-belt · (middle) Hansa |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 115.98 yr (42,362 d) |
| Aphelion | 2.9130 AU |
| Perihelion | 2.4881 AU |
Semi-major axis | 2.7006 AU |
| Eccentricity | 0.0787 |
Orbital period (sidereal) | 4.44 yr (1,621 d) |
Mean anomaly | 24.261° |
Mean motion | 0° 13m 19.56s / day |
| Inclination | 21.077° |
Longitude of ascending node | 299.59° |
| 201.60° | |
| Physical characteristics | |
Mean diameter | 54.34±3.4 km 57.505±0.443 km 58.000±4.841 km 58±16 km 58.06 km (taken) 58.062 km 59.2 km 62.57±0.64 km 63.52±11.11 km |
Synodic rotation period | 7.876 h 7.87754±0.00005 h 7.8780±0.0004 h 7.879±0.001 h 7.880±0.001 h 7.883±0.002 h 7.92 h |
| 0.204±0.069 0.214±0.006 0.218 0.2266 0.248±0.036 0.25±0.05 0.2533±0.0534 0.2786±0.038 | |
| Tholen = S SMASS = S · S B–V = 0.850 U–B = 0.454 | |
| 8.33 8.41 | |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.