(12309) Tommygrav Main-belt Asteroid
Discovered on 25 February 1992 by Spacewatch at Kitt Peak.
Tommy Grav (b. 1973) earned a Ph.D. in astronomy at the University of Oslo in 2004, in collaboration with the Harvard-Smithsonian Center for Astrophysics, and started work as Junior Scientific Researcher with Pan-STARRS. He is an experienced observer of transneptunian objects and outer satellites of the giant planets.Naming citation (20060613/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tommygrav is today
Seen from above the solar system on 2026-10-14: Tommygrav is 2.64 au from the Sun and 1.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12309 |
| Provisional designation | 1992 DD3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.65 km (#6,021 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0430 |
| Absolute magnitude (H) | 14.55 |
| Orbital period | 4.48 years |
| Semi-major axis | 2.72 au |
| Perihelion – aphelion | 2.64 – 2.80 au |
| Eccentricity | 0.0292 |
| Inclination | 0.718° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.