(144907) Whitehorne Main-belt Asteroid
Discovered on 16 December 2004 by Glinos, T., Levy, D. H., Levy, W. at Vail-Jarnac.
Mary Lou Whitehorne, currently second vice-president of the Royal Astronomical Society of Canada, has devoted much of her life to educating young people in the basics of astronomy. Her original and interesting approach has led to a surge of interest in astronomy among young people throughout Canada.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Whitehorne is today
Seen from above the solar system on 2026-10-14: Whitehorne is 3.18 au from the Sun and 4.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 144907 |
| Provisional designation | 2004 YS3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.89 km (#15,463 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0840 |
| Absolute magnitude (H) | 16.15 |
| Orbital period | 5.10 years |
| Semi-major axis | 2.96 au |
| Perihelion – aphelion | 2.64 – 3.29 au |
| Eccentricity | 0.111 |
| Inclination | 0.500° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Mary
- (4793) Slessor
- (5595) Roth
- (6603) Marycragg
- (7091) Maryfields
- (7958) Leakey
- (9824) Marylea
- (10870) Gwendolen
- (11369) Brazelton
- (12590) Ballantine
- (12627) Maryedwards
- (12628) Acworthorr
- (13412) Guerrieri
All asteroids named after someone called Mary