(20225) Petrunin Main-belt Asteroid
Discovered on 26 June 1997 by Spacewatch at Kitt Peak.
Yuri Petrunin (b. 1956) is a Russian-American optician and telescope maker. He advanced oil-spaced apochromatic triplet refractors and helped establish them among the world’s finest amateur telescopes.Naming citation (WGSBN Bull. 6, #16, 7), IAU / Minor Planet Center, via NASA/JPL
Where Petrunin is today
Seen from above the solar system on 2026-10-14: Petrunin is 3.00 au from the Sun and 3.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20225 |
| Provisional designation | 1997 MG1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.28 km (#5,563 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.156 |
| Absolute magnitude (H) | 13.11 |
| Orbital period | 5.21 years |
| Semi-major axis | 3.00 au |
| Perihelion – aphelion | 2.68 – 3.33 au |
| Eccentricity | 0.108 |
| Inclination | 10.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.69 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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- (212924) Yurishevchuk
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- (346666) Knorozov
- (549650) Bilibin
All asteroids named after someone called Yuri