(440) Theodora Main-belt Asteroid
Discovered on 13 October 1898 by E. F. Coddington at Mount Hamilton.
👶 Theodora as a baby name🐶 Theodora as a dog name
Where Theodora is today
Seen from above the solar system on 2026-10-14: Theodora is 2.27 au from the Sun and 1.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 440 |
| Provisional designation | A898 TB |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.6 km (#3,522 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.630 |
| Rotation period | 4.83 hours |
| Absolute magnitude (H) | 11.54 |
| Orbital period | 3.29 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.97 – 2.45 au |
| Eccentricity | 0.107 |
| Inclination | 1.60° |
| Closest distance between its orbit and Earth's (MOID) | 0.990 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 13 October 1898
More named asteroids discovered by E. F. Coddington
← (439) Ohio · (441) Bathilde →