(20645) Ryderstrauss Main-belt Asteroid
Discovered on 7 October 1999 by LINEAR at Socorro.
Ryder H. Strauss (b. 1998) is an American astronomer who received his Ph.D. from Northern Arizona University in 2025. His work to date has focused on the interpretation of lightcurves of small Solar System bodies as well as the Earth, and on big data projects that use computational approaches.Naming citation (WGSBN Bull. 6, #11, 31), IAU / Minor Planet Center, via NASA/JPL
Where Ryderstrauss is today
Seen from above the solar system on 2026-10-14: Ryderstrauss is 2.97 au from the Sun and 2.62 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20645 |
| Provisional designation | 1999 TH149 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.16 |
| Orbital period | 5.21 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.91 – 3.10 au |
| Eccentricity | 0.0311 |
| Inclination | 11.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.93 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 7 October 1999
- (12931) Mario
- (16089) Lamb
- (16090) Lukaszewski
- (16091) Malchiodi
- (19704) Medlock
- (20643) Angelicaliu
- (20644) Amritdas
- (20646) Nikhilgupta
- (20647) Ryujiokazaki
- (21850) Abshir
- (21852) Bolander
- (21853) Kelseykay