(3631) Sigyn Main-belt Asteroid
Discovered on 25 January 1987 by E. W. Elst at La Silla.
Where Sigyn is today
Seen from above the solar system on 2026-10-14: Sigyn is 3.03 au from the Sun and 3.92 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3631 |
| Provisional designation | 1987 BV1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 38.5 km (#1,014 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0690 |
| Rotation period | 41.0 hours |
| Absolute magnitude (H) | 11.16 |
| Orbital period | 5.44 years |
| Semi-major axis | 3.09 au |
| Perihelion – aphelion | 2.83 – 3.35 au |
| Eccentricity | 0.0831 |
| Inclination | 14.4° |
| Closest distance between its orbit and Earth's (MOID) | 1.83 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.