(7223) Dolgorukij Main-belt Asteroid
Discovered on 14 October 1982 by Zhuravleva, L. V., Karachkina, L. G. at Nauchnyj.
Named in memory of Yurij Dolgorukij (c.1095–1157), prince of Suzdal and Kiev's grand prince, son of Vladimir Monomakh. The first reference to Moscow, made in connection with Dolgorukij's visit there, is in a monastic chronicle dated 1147. Later on, in 1156, Moscow was fortified by him. This is the reason to consider 1147 as the year of the foundation of the city and Dolgorukij as its founder, although archaeological evidence indicates that the site had been settled as early as the ninth century. The name is given on the occasion of the 850th anniversary of the founding of Moscow.Naming citation (WGSBN Bull. 4, #9, 4), IAU / Minor Planet Center, via NASA/JPL
Where Dolgorukij is today
Seen from above the solar system on 2026-10-14: Dolgorukij is 2.52 au from the Sun and 2.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7223 |
| Provisional designation | 1982 TF2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.05 km (#12,621 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.391 |
| Absolute magnitude (H) | 13.84 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 1.94 – 2.76 au |
| Eccentricity | 0.175 |
| Inclination | 1.56° |
| Closest distance between its orbit and Earth's (MOID) | 0.934 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 14 October 1982
- (3067) Akhmatova
- (3511) Tsvetaeva
- (3624) Mironov
- (3750) Ilizarov
- (4075) Sviridov
- (5093) Svirelia
- (5421) Ulanova
- (5666) Rabelais
- (6172) Prokofeana
- (7558) Yurlov
- (8332) Ivantsvetaev
- (9834) Kirsanov