(5817) Robertfrazer Mars-crossing Asteroid
Discovered on 5 September 1989 by E. F. Helin at Palomar.
Robert E. Frazer (b. 1918), longtime friend and colleague of the discoverer, studied optics at the University of Rochester. He has participated in and supported many space-related programs at the Jet Propulsion Laboratory, ranging from the construction of early deep space antennas to devising a means of replicating optical mirrors.Naming citation (20000726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robertfrazer is today
Seen from above the solar system on 2026-10-14: Robertfrazer is 2.26 au from the Sun and 1.90 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5817 |
| Provisional designation | 1989 RZ |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 6.50 km (#8,254 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.297 |
| Rotation period | 4.05 hours |
| Spectral type | S |
| Absolute magnitude (H) | 12.99 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 1.59 – 3.23 au |
| Eccentricity | 0.340 |
| Inclination | 21.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.745 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Robert
- (1955) McMath
- (3514) Hooke
- (3875) Staehle
- (4564) Clayton
- (4809) Robertball
- (5109) Robertmiller
- (5308) Hutchison
- (5477) Holmes
- (5585) Parks
- (5636) Jacobson
- (5739) Robertburns
- (5871) Bobbell
All asteroids named after someone called Robert