(33529) Henden Main-belt Asteroid
Discovered on 19 April 1999 by C. W. Juels at Fountain Hills.
Arne A. Henden (b. 1950) coauthored Astronomical Photometry in 1982. He is currently director of the American Association of Variable Star Observers, and he served on the staff of the U.S. Naval Observatory in Flagstaff, Arizona, from 1993 to 2005.Naming citation (20050919/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Henden is today
Seen from above the solar system on 2026-10-14: Henden is 2.41 au from the Sun and 1.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 33529 |
| Provisional designation | 1999 HA1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.12 km (#12,457 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.125 |
| Absolute magnitude (H) | 14.69 |
| Orbital period | 3.76 years |
| Semi-major axis | 2.42 au |
| Perihelion – aphelion | 2.02 – 2.81 au |
| Eccentricity | 0.165 |
| Inclination | 4.96° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Arne
All asteroids named after someone called Arne