(4640) Hara Main-belt Asteroid
Discovered on 1 April 1989 by Kushida, Y., Muramatsu, O. at Yatsugatake.
Where Hara is today
Seen from above the solar system on 2026-10-14: Hara is 2.33 au from the Sun and 3.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4640 |
| Provisional designation | 1989 GA |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.05 km (#8,843 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.304 |
| Rotation period | 3.53 hours |
| Absolute magnitude (H) | 13.46 |
| Orbital period | 3.38 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 2.01 – 2.49 au |
| Eccentricity | 0.108 |
| Inclination | 4.21° |
| Closest distance between its orbit and Earth's (MOID) | 1.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 April 1989
More named asteroids discovered by Kushida, Y., Muramatsu, O.
- (4458) Oizumi
- (5352) Fujita
- (5405) Neverland
- (5473) Yamanashi
- (5489) Oberkochen
- (5687) Yamamotoshinobu
- (6308) Ebisuzaki
- (6395) Hilliard
- (6405) Komiyama
- (6464) Kaburaki
- (6612) Hachioji
- (6643) Morikubo
← (4639) Minox · (4641) Ayako →