(11009) Sigridclose Main-belt Asteroid
Discovered on 1 March 1981 by S. J. Bus at Siding Spring.
Sigrid Close (b. 1971) is a professor at Stanford University whose research includes meteoroid plasma detection using radar and space weather measurements using spacecraft.Naming citation (MPC batch dated 2017-03-12), IAU / Minor Planet Center, via NASA/JPL
Where Sigridclose is today
Seen from above the solar system on 2026-10-14: Sigridclose is 2.26 au from the Sun and 2.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11009 |
| Provisional designation | 1981 ET10 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.87 |
| Orbital period | 4.43 years |
| Semi-major axis | 2.70 au |
| Perihelion – aphelion | 2.24 – 3.16 au |
| Eccentricity | 0.170 |
| Inclination | 12.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.24 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 1 March 1981
- (2788) Andenne
- (3016) Meuse
- (3029) Sanders
- (3030) Vehrenberg
- (3042) Zelinsky
- (3058) Delmary
- (3075) Bornmann
- (3135) Lauer
- (3308) Ferreri
- (3472) Upgren
- (3498) Belton
- (3503) Brandt