(638) Moira Main-belt Asteroid
Discovered on 5 May 1907 by J. H. Metcalf at Taunton.
👶 Moira as a baby name🐶 Moira as a dog name
Where Moira is today
Seen from above the solar system on 2026-10-14: Moira is 3.12 au from the Sun and 2.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 638 |
| Provisional designation | A917 RC |
| Orbit class | Main-belt Asteroid |
| Diameter | 59.6 km (#593 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0600 |
| Rotation period | 9.88 hours |
| Spectral type | Ch |
| Absolute magnitude (H) | 10.09 |
| Orbital period | 4.52 years |
| Semi-major axis | 2.73 au |
| Perihelion – aphelion | 2.29 – 3.18 au |
| Eccentricity | 0.162 |
| Inclination | 7.71° |
| Closest distance between its orbit and Earth's (MOID) | 1.29 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.