(3961) Arthurcox Main-belt Asteroid
Discovered on 31 July 1962 by Indiana University at Brooklyn.
Where Arthurcox is today
Seen from above the solar system on 2026-10-14: Arthurcox is 2.53 au from the Sun and 1.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3961 |
| Provisional designation | 1962 OB |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.3 km (#4,935 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.201 |
| Absolute magnitude (H) | 12.16 |
| Orbital period | 4.25 years |
| Semi-major axis | 2.62 au |
| Perihelion – aphelion | 2.22 – 3.03 au |
| Eccentricity | 0.154 |
| Inclination | 12.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.21 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.