(20034) Greenhalgh Main-belt Asteroid
Discovered on 2 August 1992 by H. E. Holt at Palomar.
Paul Greenhalgh (1957–2017) was a Canadian amateur astronomer and a founding member of the precursor club to RASC Fraser Valley Centre. Greenhalgh worked to establish the McDonald Park Dark-Sky Preserve in Abbotsford, British Columbia, and the Merritt Star Quest event, which ran for 14 years. His passion for astronomy outreach inspired many in his community.Naming citation (WGSBN Bull. 3, #15, 9), IAU / Minor Planet Center, via NASA/JPL
Where Greenhalgh is today
Seen from above the solar system on 2026-10-14: Greenhalgh is 3.54 au from the Sun and 2.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20034 |
| Provisional designation | 1992 PK2 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.45 |
| Orbital period | 5.47 years |
| Semi-major axis | 3.10 au |
| Perihelion – aphelion | 2.63 – 3.58 au |
| Eccentricity | 0.153 |
| Inclination | 5.89° |
| Closest distance between its orbit and Earth's (MOID) | 1.62 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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