(357546) Edwardhalbach Main-belt Asteroid
Discovered on 15 September 2004 by Cooney Jr., W. R., Gross, J. at Sonoita.
Edward A. Halbach (1909-2011) was a prominent amateur astronomer who made contributions to the study of variable stars, lunar occultations, solar astronomy and aurorae. He mentored and encouraged generations of astronomers, both amateur and professional.Naming citation (MPC batch dated 2014-01-16), IAU / Minor Planet Center, via NASA/JPL
Where Edwardhalbach is today
Seen from above the solar system on 2026-10-14: Edwardhalbach is 3.12 au from the Sun and 2.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 357546 |
| Provisional designation | 2004 RA339 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.1 |
| Orbital period | 5.32 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.76 – 3.33 au |
| Eccentricity | 0.0924 |
| Inclination | 9.98° |
| Closest distance between its orbit and Earth's (MOID) | 1.77 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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