Global Information925 Alphonsina information
| Discovery [1] | |
|---|---|
| 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 [1][2] · (middle) Hansa [3][4] |
| Orbital characteristics [2] | |
| 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° |
Argument of perihelion | 201.60° |
| Physical characteristics | |
Mean diameter | 54.34±3.4 km[5] 57.505±0.443 km[6] 58.000±4.841 km[7] 58±16 km[8] 58.06 km (taken)[9] 58.062 km[10] 59.2 km[11] 62.57±0.64 km[12] 63.52±11.11 km[13] |
Synodic rotation period | 7.876 h[14] 7.87754±0.00005 h[8][15] 7.8780±0.0004 h[14] 7.879±0.001 h[16] 7.880±0.001 h[17] 7.883±0.002 h[a] 7.92 h[b] |
Geometric albedo | 0.204±0.069[13] 0.214±0.006[12] 0.218[11] 0.2266[10] 0.248±0.036[6] 0.25±0.05[18] 0.2533±0.0534[7] 0.2786±0.038[5] |
Spectral type | Tholen = S [2] SMASS = S [2][9] · S [19] B–V = 0.850[2] U–B = 0.454[2] |
Absolute magnitude (H) | 8.33[2][5][7][12][13] 8.41[9][10][11][17] |
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.[1] The S-type asteroid has a rotation period of 7.88 hours.[9] It was named for the Spanish Kings Alfonso X and Alfonso XIII.[20]
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