1555 Dejan
1555 Dejan, provisional designation 1941 SA, is an asteroid from the background population of the central regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 September 1941, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle. The asteroid was named after Dejan Đurković, son of Serbian astronomer Petar Đurković.
Shape model of Dejan from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | F. Rigaux |
| Discovery site | Uccle Obs. |
| Discovery date | 15 September 1941 |
| Designations | |
MPC designation | (1555) Dejan |
Named after | Dejan Đurković (son of astronomer Petar Đurković) |
Alternative designations | 1941 SA · 1932 PC 1934 CD1 · 1954 NJ |
Minor planet category | main-belt · (middle) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.64 yr (30,913 days) |
| Aphelion | 3.4332 AU |
| Perihelion | 1.9442 AU |
Semi-major axis | 2.6887 AU |
| Eccentricity | 0.2769 |
Orbital period (sidereal) | 4.41 yr (1,610 days) |
Mean anomaly | 71.768° |
Mean motion | 0° 13m 24.96s / day |
| Inclination | 6.0200° |
Longitude of ascending node | 318.08° |
| 47.825° | |
| Physical characteristics | |
| Dimensions | 19.21 km (calculated) 21.77±7.25 km 23.199±0.314 km 24.04±0.48 km |
Synodic rotation period | 16.960±0.002 h |
| 0.053±0.006 0.0531±0.0056 0.068±0.003 0.08±0.09 0.10 (assumed) | |
| S/C | |
| 11.65 · 11.70 | |
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