(10261) Nikdollezhal' Main-belt Asteroid
Discovered on 22 August 1974 by L. V. Zhuravleva at Nauchnyj.
Academician Nikolaj Antonovich Dollezhalʹ (1899–2000), Russian expert in power engineering, was the chief designer of the reactor for the world's first atomic power station, located in Obninsk, some 120 km southwest of Moscow.Naming citation (WGSBN Bull. 6, #10, 6), IAU / Minor Planet Center, via NASA/JPL
Where Nikdollezhal' is today
Seen from above the solar system on 2026-10-14: Nikdollezhal' is 1.90 au from the Sun and 2.09 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10261 |
| Provisional designation | 1974 QF1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.8 km (#4,160 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Rotation period | 16.7 hours |
| Absolute magnitude (H) | 13.59 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 1.80 – 3.02 au |
| Eccentricity | 0.255 |
| Inclination | 9.25° |
| Closest distance between its orbit and Earth's (MOID) | 0.787 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.