(21033) Akahirakiyozo Main-belt Asteroid
Discovered on 21 October 1989 by Endate, K., Watanabe, K. at Kitami.
Kiyozo Akahira (b. 1941) is a science historian and an amateur astronomer. He has been a high school teacher of physics for more than 35 years.Naming citation (MPC batch dated 2017-03-12), IAU / Minor Planet Center, via NASA/JPL
Where Akahirakiyozo is today
Seen from above the solar system on 2026-10-14: Akahirakiyozo is 2.39 au from the Sun and 3.37 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21033 |
| Provisional designation | 1989 UM |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.12 km (#14,914 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.415 |
| Rotation period | 17.3 hours |
| Absolute magnitude (H) | 14.45 |
| Orbital period | 3.48 years |
| Semi-major axis | 2.30 au |
| Perihelion – aphelion | 1.87 – 2.72 au |
| Eccentricity | 0.184 |
| Inclination | 1.69° |
| Closest distance between its orbit and Earth's (MOID) | 0.861 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 21 October 1989
More named asteroids discovered by Endate, K., Watanabe, K.
- (4042) Okhotsk
- (4126) Mashu
- (4460) Bihoro
- (4491) Otaru
- (4497) Taguchi
- (4508) Takatsuki
- (4547) Massachusetts
- (4585) Ainonai
- (4607) Seilandfarm
- (4641) Ayako
- (4712) Iwaizumi
- (4773) Hayakawa
← (21029) Adorno · (21035) Iwabu →