(3287) Olmstead Mars-crossing Asteroid
Discovered on 28 February 1981 by S. J. Bus at Siding Spring.
Where Olmstead is today
Seen from above the solar system on 2026-10-14: Olmstead is 2.59 au from the Sun and 2.13 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3287 |
| Provisional designation | 1981 DK1 |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 5.51 km (#9,694 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.132 |
| Rotation period | 4.96 hours |
| Spectral type | L |
| Absolute magnitude (H) | 14.34 |
| Orbital period | 3.64 years |
| Semi-major axis | 2.37 au |
| Perihelion – aphelion | 1.65 – 3.08 au |
| Eccentricity | 0.300 |
| Inclination | 12.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.694 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 28 February 1981
- (2780) Monnig
- (2958) Arpetito
- (3307) Athabasca
- (3602) Lazzaro
- (3805) Goldreich
- (4052) Crovisier
- (4192) Breysacher
- (4473) Sears
- (4523) MIT
- (4989) Joegoldstein
- (5046) Carletonmoore
- (5308) Hutchison