(6121) Plachinda Main-belt Asteroid
Discovered on 2 September 1987 by L. I. Chernykh at Nauchnyj.
At the Crimean Astrophysical Observatory, Sergej Ivanovich Plachinda (b. 1951) has contributed to investigations on the global magnetic fields of stars of different types. His wife, Nelly Ivanovna Merkulova (b. 1949), is a well-known investigator of variability in Seyfert galaxies.Naming citation (20041126/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Plachinda is today
Seen from above the solar system on 2026-10-14: Plachinda is 2.68 au from the Sun and 3.63 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6121 |
| Provisional designation | 1987 RU3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.44 km (#9,821 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.272 |
| Rotation period | 4.09 hours |
| Absolute magnitude (H) | 13.59 |
| Orbital period | 3.40 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.84 – 2.69 au |
| Eccentricity | 0.188 |
| Inclination | 3.26° |
| Closest distance between its orbit and Earth's (MOID) | 0.835 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Sergej
- (4005) Dyagilev
- (4109) Anokhin
- (4139) Ul'yanin
- (7271) Doroguntsov
- (7469) Krikalev
- (9916) Kibirev
- (14360) Ipatov
- (16419) Kovalev
- (24605) Tsykalyuk
- (649792) Sergejbondar
All asteroids named after someone called Sergej
Also discovered on 2 September 1987
- (4537) Valgrirasp
- (4944) Kozlovskij
- (5955) Khromchenko
- (6547) Vasilkarazin
- (7869) Pradun
- (15702) Olegkotov
- (18334) Drozdov
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
← (6120) Anhalt · (6122) Henrard →