(7657) Jefflarsen Main-belt Asteroid
Discovered on 25 April 1992 by Spacewatch at Kitt Peak.
Named in honor of astronomer Jeffrey A. Larsen (b. 1967), whose software expertise has allowed the Spacewatch project to upgrade its computational capability in the automatic detection of small solar system bodies. While making observations for Spacewatch he discovered comets P/1997 V1 and C/1998 M3 and more than seven near-Earth objects. Prior to joining the Spacewatch group, he participated in the Automated Plate Scanner project at the University of Minnesota, where he studied a large asymmetry in the distribution of faint halo/thick disk stars in the Milky Way.Naming citation (WGSBN Bull. 5, #28, 6), IAU / Minor Planet Center, via NASA/JPL
Where Jefflarsen is today
Seen from above the solar system on 2026-10-14: Jefflarsen is 3.06 au from the Sun and 4.05 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7657 |
| Provisional designation | 1992 HK1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.55 km (#8,184 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.180 |
| Absolute magnitude (H) | 13.47 |
| Orbital period | 4.96 years |
| Semi-major axis | 2.91 au |
| Perihelion – aphelion | 2.71 – 3.10 au |
| Eccentricity | 0.0666 |
| Inclination | 2.69° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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