(18121) Konovalenko Outer Main-belt Asteroid
Discovered on 4 July 2000 by LONEOS at Anderson Mesa.
Alexandr A. Konovalenko (b. 1951) is an academician at the Ukrainian National Academy of Sciences and a well-known radioastronomer. He is active in astrophysics and instrumentation using the largest decameter radio telescope (UTR-2). The name was suggested by D. F. Lupishko.Naming citation (20060219/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Konovalenko is today
Seen from above the solar system on 2026-10-14: Konovalenko is 3.93 au from the Sun and 4.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18121 |
| Provisional designation | 2000 NF25 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 9.25 km (#5,581 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0520 |
| Absolute magnitude (H) | 14.23 |
| Orbital period | 5.77 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 2.44 – 3.99 au |
| Eccentricity | 0.240 |
| Inclination | 0.978° |
| Closest distance between its orbit and Earth's (MOID) | 1.44 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alexandr
- (4178) Mimeev
- (10002) Bagdasarian
- (14335) Alexosipov
- (15676) Almoisheev
- (17000) Medvedev
- (23625) Gelfond
- (27659) Dolsky
- (32768) Alexandripatov
- (58097) Alimov
All asteroids named after someone called Alexandr
Also discovered on 4 July 2000
- (18106) Blume
- (18119) Braude
- (18120) Lytvynenko
- (18122) Forestamartin
- (18123) Pavan
- (28912) Sonahosseini
- (30452) Callegari
- (30453) Cambioni
- (30454) Carrillosanchez
- (30455) Joelcastro
- (32191) Bensharkey
- (32194) Mahlke