1626 Sadeya
1626 Sadeya (provisional designation 1927 AA) is a stony Phocaea asteroid and binary system from the inner regions of the asteroid belt, approximately 15 kilometers (9.3 miles) in diameter. It was discovered on 10 January 1927, by Catalan astronomer Josep Comas i Solà at Fabra Observatory in Barcelona, Spain, and named after the Spanish and American Astronomical Society. The discovery of a companion was announced on 1 December 2020.
| Discovery | |
|---|---|
| Discovered by | J. Comas Solà |
| Discovery site | Fabra Obs. |
| Discovery date | 10 January 1927 |
| Designations | |
MPC designation | (1626) Sadeya |
Named after | Spanish and American Astronomical Society |
Alternative designations | 1927 AA · 1956 AA |
Minor planet category | main-belt · Phocaea |
| Orbital characteristics | |
| Epoch 17 December 2020 (JD 2459200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 94.02 yr (34,339 d) |
| Aphelion | 3.0090 AU |
| Perihelion | 1.7185 AU |
Semi-major axis | 2.3638 AU |
| Eccentricity | 0.2730 |
Orbital period (sidereal) | 3.63 yr (1,327 d) |
Mean anomaly | 335.85° |
Mean motion | 0° 16m 16.32s / day |
| Inclination | 25.312° |
Longitude of ascending node | 279.48° |
| 149.29° | |
| Known satellites | 1 (0.26Ds/Dp; P: 2.14 d) |
| Physical characteristics | |
Mean diameter | 14.25±2.36 km 14.77±0.19 km 15.140±0.490 km 15.95 km (calculated) |
Synodic rotation period | 3.414±0.005 h 3.418±0.001 3.419±0.001 h 3.420±0.001 h 3.4200±0.0006 h 3.42048±0.00005 h 3.438±0.009 h |
| 0.23 (assumed) 0.30±0.16 0.486±0.067 0.512±0.016 | |
| S | |
| 10.50 · 11.10 · 11.2 | |
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