1397 Umtata
| Discovery | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 9 August 1936 |
| Designations | |
| (1397) Umtata | |
Named after | Mthatha (South-African town) |
| 1936 PG · 1931 GK 1945 QF · 1945 RC 1948 EB1 | |
| main-belt · (middle) background | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.14 yr (29,638 days) |
| Aphelion | 3.3646 AU |
| Perihelion | 1.9967 AU |
| 2.6806 AU | |
| Eccentricity | 0.2551 |
| 4.39 yr (1,603 days) | |
| 173.37° | |
| 0° 13m 28.56s / day | |
| Inclination | 3.5109° |
| 77.437° | |
| 206.53° | |
| Physical characteristics | |
| Dimensions | 20.35±0.30 km 20.40 km (derived) 20.798±0.292 km 22.895±0.285 km |
| 30 h | |
| 0.0794±0.0140 0.084±0.046 0.10 (assumed) 0.112±0.004 | |
| S/C B–V = 0.690 U–B = 0.210 | |
| 11.47 · 11.57 | |
1397 Umtata, provisional designation 1936 PG, is an asteroid from the background population of the asteroid belt's central region, approximately 21 kilometers in diameter. It was discovered by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg on 9 August 1936. The asteroid was named after the South-African town of Mthatha, formerly known as Umtata.