(2289) McMillan Main-belt Asteroid
Discovered on 24 September 1960 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Where McMillan is today
Seen from above the solar system on 2026-10-14: McMillan is 2.68 au from the Sun and 3.11 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2289 |
| Provisional designation | 6567 P-L |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.6 km (#4,291 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0420 |
| Rotation period | 4.48 hours |
| Absolute magnitude (H) | 13.7 |
| Orbital period | 4.28 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.26 – 3.01 au |
| Eccentricity | 0.142 |
| Inclination | 2.15° |
| Closest distance between its orbit and Earth's (MOID) | 1.25 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 24 September 1960
- (1743) Schmidt
- (1744) Harriet
- (1776) Kuiper
- (1777) Gehrels
- (1795) Woltjer
- (1808) Bellerophon
- (1809) Prometheus
- (1810) Epimetheus
- (1811) Bruwer
- (1812) Gilgamesh
- (1846) Bengt
- (1868) Thersites