(31985) Andrewryan Main-belt Asteroid
Discovered on 24 April 2000 by LONEOS at Anderson Mesa.
Andrew J. Ryan (b. 1988) is a Postdoctoral Research Associate at University of Arizona and works on the OSIRIS-Rex mission to asteroid (101955) Bennu. He is an expert in the thermal conductivity of planetary materials.Naming citation (WGSBN Bull. 1, #2, 16), IAU / Minor Planet Center, via NASA/JPL
Where Andrewryan is today
Seen from above the solar system on 2026-10-14: Andrewryan is 2.05 au from the Sun and 2.63 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31985 |
| Provisional designation | 2000 HV23 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.17 km (#14,793 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0640 |
| Absolute magnitude (H) | 16.04 |
| Orbital period | 3.72 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 1.96 – 2.85 au |
| Eccentricity | 0.186 |
| Inclination | 3.41° |
| Closest distance between its orbit and Earth's (MOID) | 0.940 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Andrew
- (5280) Andrewbecker
- (5441) Andymurray
- (6814) Steffl
- (6825) Irvine
- (6947) Andrewdavis
- (7150) McKellar
- (8257) Andycheng
- (8867) Tubbiolo
- (9999) Wiles
- (10230) Andrewnorton
- (11450) Shearer
- (12506) Pariser
All asteroids named after someone called Andrew
Also discovered on 24 April 2000
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- (15631) Dellorusso
- (23173) Hideaki
- (26636) Ericabroman
- (27520) Rounds
- (27521) Josschindler
- (28769) Elisabethadams
- (28788) Hayes-Gehrke
- (30254) Kaminski
- (30255) Bohner
- (30278) Gazeas
- (30279) Binnie