1244 Deira
Modelled shape of Deira from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 25 May 1932 |
| Designations | |
| (1244) Deira | |
| Pronunciation | /ˈdaɪrə/ DY-rə or /ˈdɛərə/ DAIR-ə |
Named after | Deira, near the town of Ossett, England (alt. Celtic Kingdom of Deira) |
| 1932 KE · 1930 YR 1984 YQ6 · A908 TD A921 GC · A924 BH | |
| |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.13 yr (39,861 days) |
| Aphelion | 2.5731 AU |
| Perihelion | 2.1129 AU |
| 2.3430 AU | |
| Eccentricity | 0.0982 |
| 3.59 yr (1,310 days) | |
| 335.23° | |
| 0° 16m 29.28s / day | |
| Inclination | 8.6950° |
| 277.12° | |
| 261.45° | |
| Physical characteristics | |
| 28.816±0.546 km 30.432±9.136 km 30.95±1.9 km 31.799±0.487 km 32.28±0.35 km 33.15±7.01 km 35.19±0.19 km | |
| 5 (poor) h 210.6±0.1 h 216.98±0.05 h 217.1±0.1 h | |
Pole ecliptic latitude |
|
| 0.03±0.00 0.0357±0.0051 0.037±0.011 0.0416±0.0312 0.052±0.001 0.0557±0.007 | |
| 11.30 11.50 | |
1244 Deira (prov. designation: 1932 KE) is a dark background asteroid and slow rotator from the inner region of the asteroid belt. The X-type asteroid has an exceptionally long rotation period of 210.6 hours and measures approximately 31 kilometers (19 miles) in diameter. It was discovered on 25 May 1932, by English-born South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, who named it after Deira, an old kingdom near his birthplace, the market town of Ossett, located in West Yorkshire, England.