(11997) Fassel Main-belt Asteroid
Discovered on 18 December 1995 by Spacewatch at Kitt Peak.
Deborah Elizabeth Fassel (b. 1950) and Charles Sebastian Fassel (b. 1955) are amateur astronomers who live in St. Catharines, Ontario.Naming citation (20020427/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Fassel is today
Seen from above the solar system on 2026-10-14: Fassel is 3.00 au from the Sun and 2.70 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11997 |
| Provisional designation | 1995 YU9 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.11 |
| Orbital period | 5.22 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.82 – 3.19 au |
| Eccentricity | 0.0618 |
| Inclination | 9.27° |
| Closest distance between its orbit and Earth's (MOID) | 1.83 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Deborah
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- (13849) Dunn
- (14174) Deborahsmall
- (20897) Deborahdomingue
- (25406) Debwysocki
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- (604429) Lokhorst
All asteroids named after someone called Deborah