(20112) Cassia Main-belt Asteroid
Discovered on 20 September 1995 by Spacewatch at Kitt Peak.
Dennis Cassia (1951–2025) was an accomplished American astrophotographer for nearly six decades who was well-known for helping to organize the annual Stellafane Conference each summer in Vermont. By profession, he served in the Monroe (Connecticut) Fire Department for 40 years, where he helped to teach and develop thousands of firefighters and officers.Naming citation (WGSBN Bull. 6, #7, 7), IAU / Minor Planet Center, via NASA/JPL
👶 Cassia as a baby name🐶 Cassia as a dog name
Where Cassia is today
Seen from above the solar system on 2026-10-14: Cassia is 2.65 au from the Sun and 1.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20112 |
| Provisional designation | 1995 SD31 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.64 km (#13,615 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.306 |
| Absolute magnitude (H) | 14.49 |
| Orbital period | 4.38 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.39 – 2.97 au |
| Eccentricity | 0.108 |
| Inclination | 9.96° |
| Closest distance between its orbit and Earth's (MOID) | 1.41 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Dennis
- (1806) Derice
- (1978) Patrice
- (4706) Dennisreuter
- (4958) Wellnitz
- (8357) O'Connor
- (10033) Bodewits
- (25232) Schatz
- (25823) Dentrujillo
- (27423) Dennisbowers
- (28057) Hollars
- (33508) Drewnik
- (100485) Russelldavies
All asteroids named after someone called Dennis
Also discovered on 20 September 1995
- (7442) Inouehideo
- (8560) Tsubaki
- (9088) Maki
- (11978) Makotomasako
- (12408) Fujioka
- (12411) Tannokayo
- (12412) Muchisachie
- (12787) Abetadashi
- (13156) Mannoucyo
- (15843) Comcom
- (16713) Airashi
- (17603) Qoyllurwasi