(28137) Helenyao Main-belt Asteroid
Discovered on 26 September 1998 by LINEAR at Socorro.
Helen Yao (b. 1993) was awarded second place in the 2011 Intel International Science and Engineering Fair for her animal sciences project. She attends the Staten Island Technical High School, Staten Island, New York, U.S.A.Naming citation (20121029/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Helenyao is today
Seen from above the solar system on 2026-10-14: Helenyao is 2.22 au from the Sun and 3.17 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 28137 |
| Provisional designation | 1998 SY138 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.87 |
| Orbital period | 3.70 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.21 – 2.57 au |
| Eccentricity | 0.0759 |
| Inclination | 7.28° |
| Closest distance between its orbit and Earth's (MOID) | 1.21 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
- (30281) Horstman
- (32277) Helenliu
- (33737) Helenlyons
- (71669) Dodsonprince
- (78432) Helensailer
- (111696) Helenorman
- (123818) Helenzier
All asteroids named after someone called Helen
Also discovered on 26 September 1998
- (10237) Adzic
- (10238) Ananyakarthik
- (11380) Amolsingh
- (11382) Juliasitu
- (12915) Rinoliver
- (13336) Jillpernell
- (13337) Sampath
- (13339) Williamsmith
- (13341) Kellysweeney
- (13343) Annietaylor
- (13344) Upenieks
- (13346) Danielmiller