1696 Nurmela
1696 Nurmela, provisional designation 1939 FF, is a Baptistina asteroid from the inner regions of the asteroid belt, approximately 10 kilometers (6 miles) in diameter. It was discovered on 18 March 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named after Finnish academician Tauno Nurmela. The possibly elongated asteroid has a rotation period of 3.15 hours.
| Discovery | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 18 March 1939 |
| Designations | |
MPC designation | (1696) Nurmela |
Named after | Tauno Nurmela (University of Turku) |
Alternative designations | 1939 FF · 1939 GL 1949 DK · 1951 YK |
Minor planet category | main-belt · inner Baptistina · Flora |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.30 yr (28,598 d) |
| Aphelion | 2.4842 AU |
| Perihelion | 2.0391 AU |
Semi-major axis | 2.2616 AU |
| Eccentricity | 0.0984 |
Orbital period (sidereal) | 3.40 yr (1,242 d) |
Mean anomaly | 76.752° |
Mean motion | 0° 17m 23.28s / day |
| Inclination | 6.0374° |
Longitude of ascending node | 21.035° |
| 164.84° | |
| Physical characteristics | |
Mean diameter | 6.06±1.18 km 7.69±2.07 km 9.232±0.181 km 9.911±0.056 km 10.31±0.44 km 14.64 km (calculated) |
Synodic rotation period | 3.1587±0.0001 h 3.1587±0.0001 h 3.159±0.001 h |
| 0.057 (assumed) 0.116±0.011 0.1246±0.0166 0.155±0.021 0.18±0.13 0.28±0.20 | |
| C (assumed) | |
| 12.90 13.19 | |
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