(31569) Adriansonka Main-belt Asteroid
Discovered on 22 March 1999 by LONEOS at Anderson Mesa.
Adrian Sonka (b. 1977) is a Romanian astronomer at the Astronomical Institute (Bucharest) whose research contributions include astrometry and photometry of near-Earth objects, with dedication toward communicating astronomy to the public in Romania.Naming citation (WGSBN Bull. 1, #2, 15), IAU / Minor Planet Center, via NASA/JPL
Where Adriansonka is today
Seen from above the solar system on 2026-10-14: Adriansonka is 2.33 au from the Sun and 2.80 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31569 |
| Provisional designation | 1999 FL18 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.11 km (#12,471 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.262 |
| Absolute magnitude (H) | 14.36 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.03 – 2.60 au |
| Eccentricity | 0.122 |
| Inclination | 6.39° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Adrian
- (5758) Brunini
- (7549) Woodard
- (10677) Colucci
- (11854) Ludwigrichter
- (21758) Adrianveres
- (21949) Tatulian
- (32008) Adriangalad
- (163255) Adrianhill
- (295492) Adrianprakhov
All asteroids named after someone called Adrian
Also discovered on 22 March 1999
- (11202) Teddunham
- (17031) Piethut
- (17032) Edlu
- (17033) Rusty
- (17034) Vasylshev
- (17035) Velichko
- (17036) Krugly
- (17045) Markert
- (17898) Scottsheppard
- (17899) Mariacristina
- (28344) Tallsalt
- (28345) Akivabarnun