(9599) Onotomoko Main-belt Asteroid
Discovered on 29 October 1991 by Endate, K., Watanabe, K. at Kitami.
Tomoko Ono (b. 1968) is one of the most active staff members in the Public Relations Center at the National Astronomical Observatory of Japan. Her passion for astronomy education is also acknowledged by the editorial staff of the Astronomical Society of Japan's newsletter, The Astronomical Herald.Naming citation (20030106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Onotomoko is today
Seen from above the solar system on 2026-10-14: Onotomoko is 2.36 au from the Sun and 2.50 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9599 |
| Provisional designation | 1991 UP2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.30 km (#12,036 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.316 |
| Absolute magnitude (H) | 14.01 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.96 – 2.59 au |
| Eccentricity | 0.139 |
| Inclination | 4.63° |
| Closest distance between its orbit and Earth's (MOID) | 0.963 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Tomoko
All asteroids named after someone called Tomoko
Also discovered on 29 October 1991
- (6097) Koishikawa
- (6607) Matsushima
- (12734) Haruna
- (13540) Kazukitakahashi
- (14426) Katotsuyoshi
- (20018) Paulgray
- (23495) Nagaotoshiko
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
← (9594) Garstang · (9602) Oya →