(4225) Hobart Main-belt Asteroid
Discovered on 31 January 1989 by Hioki, T., Kawasato, N. at Okutama.
Joseph R. Hobart (b. 1944) is an electrical engineer, amateur radio operator W7LUX, and minor-planet and variable-star observer. As of March 2011 he has improved the orbits of more than 700 minor planets, many of which were in danger of loss, and discovered 80 minor planets including NEO 2010~RA91.Naming citation (20110517/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hobart is today
Seen from above the solar system on 2026-10-14: Hobart is 2.31 au from the Sun and 3.31 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4225 |
| Provisional designation | 1989 BN |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.40 km (#8,385 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.326 |
| Rotation period | 5.55 hours |
| Absolute magnitude (H) | 13.13 |
| Orbital period | 3.36 years |
| Semi-major axis | 2.24 au |
| Perihelion – aphelion | 2.00 – 2.48 au |
| Eccentricity | 0.108 |
| Inclination | 3.48° |
| Closest distance between its orbit and Earth's (MOID) | 0.989 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Joseph
- (2157) Ashbrook
- (5034) Joeharrington
- (5577) Priestley
- (5883) Josephblack
- (6540) Stepling
- (6743) Liu
- (7656) Joemontani
- (8023) Josephwalker
- (8255) Masiero
- (8661) Ratzinger
- (8794) Joepatterson
- (9413) Eichendorff
All asteroids named after someone called Joseph
Also discovered on 31 January 1989
More named asteroids discovered by Hioki, T., Kawasato, N.
← (4224) Susa · (4226) Damiaan →