(10446) Siegbahn Main-belt Asteroid
Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Swedish physicist Kai M. Siegbahn (b. 1918) was awarded the Nobel Prize for physics in 1981 for his contribution to the development of high-resolution electron spectroscopy. The name was suggested by W. A. Fröger.Naming citation (20010705/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Siegbahn is today
Seen from above the solar system on 2026-10-14: Siegbahn is 2.20 au from the Sun and 2.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10446 |
| Provisional designation | 3006 T-3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.84 km (#5,880 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0470 |
| Rotation period | 5.68 hours |
| Absolute magnitude (H) | 14.56 |
| Orbital period | 3.31 years |
| Semi-major axis | 2.22 au |
| Perihelion – aphelion | 1.97 – 2.48 au |
| Eccentricity | 0.115 |
| Inclination | 6.71° |
| Closest distance between its orbit and Earth's (MOID) | 0.970 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Kai
All asteroids named after someone called Kai
Also discovered on 16 October 1977
- (3798) de Jager
- (3936) Elst
- (4044) Erikhog
- (4108) Rakos
- (4722) Agelaos
- (4753) Phidias
- (4754) Panthoos
- (5610) Balster
- (5699) Munch
- (5700) Homerus
- (5984) Lysippus
- (6055) Brunelleschi