(123818) Helenzier Main-belt Asteroid
Discovered on 31 January 2001 by D. Healy at Junk Bond.
Helen Zier (b. 1938) is an amateur astronomer, birder and volunteer in several scientific research programs. Active in the Huachuca Astronomy Club of Southeastern Arizona, she scans the skies with her 10-cm reflector when not engaged in volunteer work.Naming citation (20070106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Helenzier is today
Seen from above the solar system on 2026-10-14: Helenzier is 2.90 au from the Sun and 3.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 123818 |
| Provisional designation | 2001 BC75 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.66 |
| Orbital period | 4.82 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.81 – 2.90 au |
| Eccentricity | 0.0153 |
| Inclination | 3.03° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Helen
- (13437) Wellton-Persson
- (13975) Beatrixpotter
- (20449) Katiejoy
- (23011) Petach
- (24422) Helentressa
- (28137) Helenyao
- (30281) Horstman
- (32277) Helenliu
- (33737) Helenlyons
- (71669) Dodsonprince
- (78432) Helensailer
- (111696) Helenorman
All asteroids named after someone called Helen