(9919) Undset Main-belt Asteroid
Discovered on 22 August 1979 by C.-I. Lagerkvist at La Silla.
The Norwegian author Sigrid Undset (1882-1949) received the Nobel prize for literature in 1928. She is best known for her trilogy Kristin Lavransdatter about a couple's love and life in Norway in the thirteenth century.Naming citation (20020921/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Undset is today
Seen from above the solar system on 2026-10-14: Undset is 2.46 au from the Sun and 3.03 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9919 |
| Provisional designation | 1979 QF1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.52 km (#16,224 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.334 |
| Absolute magnitude (H) | 15.15 |
| Orbital period | 3.67 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 1.88 – 2.88 au |
| Eccentricity | 0.210 |
| Inclination | 1.61° |
| Closest distance between its orbit and Earth's (MOID) | 0.880 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Sigrid
All asteroids named after someone called Sigrid
Also discovered on 22 August 1979
- (2589) Daniel
- (2694) Pino Torinese
- (3005) Pervictoralex
- (3331) Kvistaberg
- (5088) Tancredi
- (6686) Hernius
- (7217) Dacke
- (8793) Thomasmuller
- (9273) Schloerb
- (9831) Simongreen
- (10021) Henja
- (11449) Stephwerner