970 Primula
970 Primula (prov. designation: A921 WK or 1921 LB) is a stony background asteroid from the central regions of the asteroid belt, approximately 9.2 kilometers (5.7 miles) in diameter. It was discovered on 29 November 1921, by astronomer Karl Reinmuth at the Heidelberg Observatory in southern Germany. The S-type asteroid has a short rotation period of 2.8 hours. It was named after the genus of flowering plants, Primula, which are also known as "primroses".
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 29 November 1921 |
| Designations | |
| (970) Primula | |
| Pronunciation | /ˈprɪmjʊlə/ |
Named after | Primula (genus of flowers) |
| A921 WK · 1929 RN 1966 TG · 1921 LB | |
| main-belt · (middle) background | |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 98.11 yr (35,834 d) |
| Aphelion | 3.2552 AU |
| Perihelion | 1.8644 AU |
| 2.5598 AU | |
| Eccentricity | 0.2717 |
| 4.10 yr (1,496 d) | |
| 17.501° | |
| 0° 14m 26.52s / day | |
| Inclination | 5.0331° |
| 310.77° | |
| 95.564° | |
| Physical characteristics | |
Mean diameter | 9.204±0.289 km |
| 2.777±0.001 h | |
| 0.229±0.031 | |
| SMASS = S | |
| 12.3 | |
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