(546098) Kosaka Main-belt Asteroid
Discovered on 8 October 2010 by K. Cernis at Moletai.
Kozo Kosaka (b. 1952) is a Japanese amateur astronomer who discovered comet C/1969 T1 (Tago–Sato–Kosaka) with a 15-cm reflector, when he was only 17 years old. He is one of the youngest comet discoverers in history. Kosaka was also active in observing variable stars and contributed observations to the Variable Star Observers League in Japan.Naming citation (WGSBN Bull. 6, #16, 10), IAU / Minor Planet Center, via NASA/JPL
Where Kosaka is today
Seen from above the solar system on 2026-10-14: Kosaka is 2.87 au from the Sun and 2.12 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 546098 |
| Provisional designation | 2010 TF65 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.66 |
| Orbital period | 5.22 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.52 – 3.49 au |
| Eccentricity | 0.161 |
| Inclination | 9.90° |
| Closest distance between its orbit and Earth's (MOID) | 1.53 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.