(20589) Hennyadmoni Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Henny Admoni (b. 1986) was awarded first place and Best in Category in the 2004 Intel International Science and Engineering Fair for her behavioral and social sciences project. She also received the Seaborg SIYSS Award. She attends the John L. Miller-Great Neck North High School, Great Neck, New York, U.S.A.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hennyadmoni is today
Seen from above the solar system on 2026-10-14: Hennyadmoni is 2.43 au from the Sun and 3.12 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20589 |
| Provisional designation | 1999 RQ168 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.44 km (#16,363 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.324 |
| Absolute magnitude (H) | 14.91 |
| Orbital period | 4.16 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.21 – 2.96 au |
| Eccentricity | 0.146 |
| Inclination | 3.23° |
| Closest distance between its orbit and Earth's (MOID) | 1.20 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Henny
All asteroids named after someone called Henny
Also discovered on 9 September 1999
- (12127) Mamiya
- (12130) Mousa
- (12589) Davidanand
- (12590) Ballantine
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra