(4858) Vorobjov Main-belt Asteroid
Discovered on 23 October 1985 by J. Gibson at Palomar.
Amateur astronomer Tomas Vorobjov (b. 1984) is an assiduous observer of minor planets and a participant in the International Astronomical Search Collaboration. He has been responsible for verifying student asteroid discoveries and taking follow-up images to complete the discovery process. Name suggested by S. Foglia.Naming citation (20110715/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Vorobjov is today
Seen from above the solar system on 2026-10-14: Vorobjov is 2.41 au from the Sun and 2.64 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4858 |
| Provisional designation | 1985 UA |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.31 km (#14,446 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.337 |
| Rotation period | 11.8 hours |
| Absolute magnitude (H) | 14.42 |
| Orbital period | 3.22 years |
| Semi-major axis | 2.18 au |
| Perihelion – aphelion | 1.94 – 2.42 au |
| Eccentricity | 0.109 |
| Inclination | 3.28° |
| Closest distance between its orbit and Earth's (MOID) | 0.962 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Tomas
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