(2540) Blok Main-belt Asteroid
Discovered on 13 October 1971 by L. I. Chernykh at Nauchnyj.
Where Blok is today
Seen from above the solar system on 2026-10-14: Blok is 2.23 au from the Sun and 1.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2540 |
| Provisional designation | 1971 TH2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.67 km (#9,447 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.302 |
| Rotation period | 19.2 hours |
| Absolute magnitude (H) | 13.2 |
| Orbital period | 3.26 years |
| Semi-major axis | 2.20 au |
| Perihelion – aphelion | 2.08 – 2.31 au |
| Eccentricity | 0.0512 |
| Inclination | 1.27° |
| Closest distance between its orbit and Earth's (MOID) | 1.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 13 October 1971
More named asteroids discovered by L. I. Chernykh
- (1737) Severny
- (1771) Makover
- (1772) Gagarin
- (1789) Dobrovolsky
- (1790) Volkov
- (1792) Reni
- (1805) Dirikis
- (1828) Kashirina
- (1832) Mrkos
- (1833) Shmakova
- (1855) Korolev
- (1856) Ruzena
← (2539) Ningxia · (2541) Edebono →