714 Ulula
714 Ulula is a main belt asteroid. It is orbiting the Sun near the 3:1 Kirkwood Gap with a period of 4.04 years and an eccentricity of 0.057. It was discovered by German astronomer J. Helffrich on 18 May 1911 from the Heidelberg Observatory and was named after an order of owls. The asteroid has a mean radius of 20 km and is spinning with a rotation period of seven hours. Its pole of rotation lies just 4–14° away from the plane of the ecliptic. The surface spectrum shows a pyroxene chemistry and is consistent with mesosiderites/HED meteorites.
A three-dimensional model of 714 Ulula based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | J. Helffrich |
| Discovery site | Heidelberg Obs. |
| Discovery date | 18 May 1911 |
| Designations | |
MPC designation | (714) Ulula |
| Pronunciation | /ˈʌljʊlə/ |
Alternative designations | 1911 LW |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 104.92 yr (38323 d) |
| Aphelion | 2.6801 AU (400.94 Gm) |
| Perihelion | 2.3892 AU (357.42 Gm) |
Semi-major axis | 2.5347 AU (379.19 Gm) |
| Eccentricity | 0.057381 |
Orbital period (sidereal) | 4.04 yr (1474.0 d) |
Mean anomaly | 128.475° |
Mean motion | 0° 14m 39.264s / day |
| Inclination | 14.271° |
Longitude of ascending node | 233.847° |
| 232.003° | |
| Physical characteristics | |
Mean radius | 19.59±1.2 km |
Synodic rotation period | 6.998 h (0.2916 d) |
| 0.2711±0.037 | |
| 9.1 | |
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