(39509) Kardashev Main-belt Asteroid
Discovered on 22 October 1981 by N. S. Chernykh at Nauchnyj.
Nikolaj Semenovich Kardashev (b. 1932), director of the Astrospace Center of the Lebedev Physical Institute, has made significant contributions to the study of atomic radiations in the inter-stellar medium, developed multidimensional cosmology and now directs the experiment RadioAstron.Naming citation (20120207/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Kardashev is today
Seen from above the solar system on 2026-10-14: Kardashev is 3.30 au from the Sun and 4.22 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 39509 |
| Provisional designation | 1981 US11 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.70 km (#6,869 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0570 |
| Absolute magnitude (H) | 14.35 |
| Orbital period | 4.68 years |
| Semi-major axis | 2.80 au |
| Perihelion – aphelion | 2.15 – 3.44 au |
| Eccentricity | 0.231 |
| Inclination | 8.42° |
| Closest distance between its orbit and Earth's (MOID) | 1.15 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Nikolaj
- (2233) Kuznetsov
- (2238) Steshenko
- (2342) Lebedev
- (3958) Komendantov
- (4067) Mikhel'son
- (4208) Kiselev
- (4233) Pal'chikov
- (4654) Gor'kavyj
- (5075) Goryachev
- (5087) Emel'yanov
- (5158) Ogarev
- (6483) Nikolajvasil'ev
All asteroids named after someone called Nikolaj