(13111) Papacosmas Inner Main-belt Asteroid
Discovered on 23 July 1993 by Shoemaker, C. S., Levy, D. H. at Palomar.
Constantine Papacosmas (b. 1939) an accomplished amateur astronomer in Montreal has guided thousands of people to learn the night sky. The telescopes he has constructed are among the finest in Canada, including a refractor that won an award at Stellafane in 1979.Naming citation (20001111/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Papacosmas is today
Seen from above the solar system on 2026-10-14: Papacosmas is 1.92 au from the Sun and 1.56 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13111 |
| Provisional designation | 1993 OW1 |
| Orbit class | Inner Main-belt Asteroid |
| Diameter | 2.80 km (#15,656 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.472 |
| Rotation period | 17.0 hours |
| Absolute magnitude (H) | 14.38 |
| Orbital period | 2.71 years |
| Semi-major axis | 1.94 au |
| Perihelion – aphelion | 1.75 – 2.13 au |
| Eccentricity | 0.0964 |
| Inclination | 27.4° |
| Closest distance between its orbit and Earth's (MOID) | 0.759 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Constantine
All asteroids named after someone called Constantine