Theodora (minor planet designation: 440 Theodora) is a small Main belt asteroid.[2]
![]() A three-dimensional model of 440 Theodora based on its light curve | |
Discovery | |
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Discovered by | E. F. Coddington |
Discovery date | 13 October 1898 |
Designations | |
MPC designation | (440) Theodora |
Pronunciation | /θiːəˈdɔːrə/[1] |
Alternative designations | 1898 EC |
Minor planet category | Main belt |
Orbital characteristics[2] | |
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° 17m 59.669s / day |
Inclination | 1.59566° |
Longitude of ascending node | 292.133° |
Argument of perihelion | 179.039° |
Physical characteristics | |
Dimensions | 13.6 km[2] |
Synodic rotation period | 4.828 h (0.2012 d) |
Geometric albedo | 0.630[2] |
Absolute magnitude (H) | 11.6[2] |
It was discovered by E. F. Coddington on October 13, 1898, at Mount Hamilton. It was his second asteroid discovery.
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