(21856) Heathermaria Main-belt Asteroid
Discovered on 7 October 1999 by LINEAR at Socorro.
Heather Maria Foster (b. 1990) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her botany & zoology project. She attends the Citrus Springs Middle School, Citrus Springs, Florida.Naming citation (20051019/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Heathermaria is today
Seen from above the solar system on 2026-10-14: Heathermaria is 2.56 au from the Sun and 2.25 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21856 |
| Provisional designation | 1999 TR150 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.55 |
| Orbital period | 3.29 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.86 – 2.57 au |
| Eccentricity | 0.160 |
| Inclination | 5.45° |
| Closest distance between its orbit and Earth's (MOID) | 0.844 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Heather
- (10686) Kaluna
- (15617) Fallowfield
- (18679) Heatherenae
- (19475) Mispagel
- (19531) Charton
- (22599) Heatherhall
- (22873) Heatherholt
- (25765) Heatherlynne
- (26739) Hemaeberhart
- (27349) Enos
- (27480) Heablonsky
- (27495) Heatherfennell
All asteroids named after someone called Heather
Also discovered on 7 October 1999
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- (16090) Lukaszewski
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- (19704) Medlock
- (20643) Angelicaliu
- (20644) Amritdas
- (20645) Ryderstrauss
- (20646) Nikhilgupta
- (20647) Ryujiokazaki
- (21850) Abshir
- (21852) Bolander