(3172) Hirst Main-belt Asteroid
Discovered on 24 November 1981 by E. Bowell at Anderson Mesa.
Where Hirst is today
Seen from above the solar system on 2026-10-14: Hirst is 1.89 au from the Sun and 1.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3172 |
| Provisional designation | 1981 WW |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.62 km (#9,543 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.387 |
| Absolute magnitude (H) | 13.24 |
| Orbital period | 3.78 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 1.89 – 2.96 au |
| Eccentricity | 0.222 |
| Inclination | 3.65° |
| Closest distance between its orbit and Earth's (MOID) | 0.887 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 24 November 1981
- (2633) Bishop
- (2708) Burns
- (2813) Zappala
- (3173) McNaught
- (3454) Lieske
- (3853) Haas
- (3944) Halliday
- (4024) Ronan
- (4025) Ridley
- (5500) Twilley
- (6628) Dondelia
- (7738) Heyman