(23011) Petach Main-belt Asteroid
Discovered on 14 November 1999 by LINEAR at Socorro.
Helen Petach mentored a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Fairview High School, Boulder, Colorado.Naming citation (20070303/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Petach is today
Seen from above the solar system on 2026-10-14: Petach is 2.05 au from the Sun and 2.83 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23011 |
| Provisional designation | 1999 VG163 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.19 km (#8,648 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0510 |
| Absolute magnitude (H) | 15.35 |
| Orbital period | 3.68 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 1.98 – 2.79 au |
| Eccentricity | 0.169 |
| Inclination | 5.54° |
| Closest distance between its orbit and Earth's (MOID) | 0.979 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
- (24422) Helentressa
- (28137) Helenyao
- (30281) Horstman
- (32277) Helenliu
- (33737) Helenlyons
- (71669) Dodsonprince
- (78432) Helensailer
- (111696) Helenorman
- (123818) Helenzier
All asteroids named after someone called Helen
Also discovered on 14 November 1999
- (16105) Marksaunders
- (17185) Mcdavid
- (21952) Terry
- (22978) Nyrola
- (23008) Rebeccajohns
- (23010) Kathyfinch
- (23013) Carolsmyth
- (24146) Benjamueller
- (24147) Stefanmuller
- (24148) Mychajliw
- (25424) Gunasekaran
- (25425) Chelsealynn