1213 Algeria
1213 Algeria (provisional designation 1931 XD) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. Discovered by Guy Reiss at Algiers Observatory in 1931, it was named after the North African country of Algeria.
| Discovery | |
|---|---|
| Discovered by | G. Reiss |
| Discovery site | Algiers Obs. |
| Discovery date | 5 December 1931 |
| Designations | |
MPC designation | (1213) Algeria |
Named after | Algeria (country) |
Alternative designations | 1931 XD |
Minor planet category | main-belt · (outer) |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.53 yr (30,873 days) |
| Aphelion | 3.5408 AU |
| Perihelion | 2.7442 AU |
Semi-major axis | 3.1425 AU |
| Eccentricity | 0.1267 |
Orbital period (sidereal) | 5.57 yr (2,035 days) |
Mean anomaly | 168.11° |
Mean motion | 0° 10m 36.84s / day |
| Inclination | 13.064° |
Longitude of ascending node | 271.54° |
| 108.60° | |
| Physical characteristics | |
| Dimensions | 29.175±0.251 30.189±0.239 km 30.6±3.1 km 31±3 km 33.08 km (derived) 33.20±4.7 km (IRAS:3) 33.51±0.78 km 34.46±0.67 km |
Synodic rotation period | 16 h |
| 0.057±0.010 0.0586 (derived) 0.06±0.01 0.07±0.01 0.076±0.003 0.0767±0.027 (IRAS:3) 0.0934±0.0106 | |
| C | |
| 10.8 11.1 11.33±0.30 | |
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