.png) A three-dimensional model of 440 Theodora based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | E. F. Coddington |
| Discovery date | 13 October 1898 |
| Designations | |
| MPC designation | (440) Theodora |
| Pronunciation | /θiːəˈdɔːrə/ |
| Alternative designations | 1898 EC |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.50 yr (42917 d) |
| Aphelion | 2.44735 AU (366.118 Gm) |
| Perihelion | 1.97352 AU (295.234 Gm) |
| Semi-major axis | 2.21043 AU (330.676 Gm) |
| Eccentricity | 0.10718 |
| Orbital period (sidereal) | 3.29 yr (1200.4 d) |
| Mean anomaly | 224.670° |
| Mean motion | 0° 17 59.669 / day |
| Inclination | 1.59566° |
| Longitude of ascending node | 292.133° |
| Argument of perihelion | 179.039° |
| Physical characteristics | |
| Dimensions | 13.6 km |
| Synodic rotation period | 4.828 h (0.2012 d) |
| Geometric albedo | 0.630 |
| Absolute magnitude (H) | 11.6 |
440 Theodora is a small Main belt asteroid.
It was discovered by E. F. Coddington on October 13, 1898, at Mount Hamilton. It was his second asteroid discovery.
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "440 Theodora (1898 EC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 16 September 2020. Retrieved 10 May 2016.
External links
- 440 Theodora at AstDyS-2, Asteroids—Dynamic Site
- 440 Theodora at the JPL Small-Body Database
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