(9720) Ulfbirgitta Main-belt Asteroid
Discovered on 16 March 1980 by C.-I. Lagerkvist at La Silla.
Ulf and Birgitta Heyman are old friends of the discoverer and his wife. This naming is to celebrate Ulf's fiftieth birthday.Naming citation (19991123/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ulfbirgitta is today
Seen from above the solar system on 2026-10-14: Ulfbirgitta is 3.07 au from the Sun and 3.40 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9720 |
| Provisional designation | 1980 FH1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.52 km (#9,680 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.333 |
| Absolute magnitude (H) | 13.3 |
| Orbital period | 5.03 years |
| Semi-major axis | 2.94 au |
| Perihelion – aphelion | 2.63 – 3.25 au |
| Eccentricity | 0.105 |
| Inclination | 11.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.64 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 16 March 1980
- (2902) Westerlund
- (3386) Klementinum
- (3634) Iwan
- (4169) Celsius
- (4593) Reipurth
- (5221) Fabribudweis
- (5498) Gustafsson
- (5938) Keller
- (6150) Neukum
- (6687) Lahulla
- (6945) Dahlgren
- (7548) Engstrom
More named asteroids discovered by C.-I. Lagerkvist
- (2114) Wallenquist
- (2191) Uppsala
- (2274) Ehrsson
- (2589) Daniel
- (2694) Pino Torinese
- (2744) Birgitta
- (2902) Westerlund
- (3005) Pervictoralex
- (3250) Martebo
- (3331) Kvistaberg
- (3573) Holmberg
- (3634) Iwan
← (9719) Yakage · (9721) Doty →