(81915) Hartwick Outer Main-belt Asteroid
Discovered on 15 July 2000 by D. D. Balam at Dominion.
F. David A. Hartwick (b. 1941) is a professor of physics and astronomy at the University of Victoria and a leading authority in the field of galaxy formation and evolution. He is legendary for his encyclopedic knowledge of astronomy.Naming citation (20040928/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hartwick is today
Seen from above the solar system on 2026-10-14: Hartwick is 3.11 au from the Sun and 3.93 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 81915 |
| Provisional designation | 2000 NS11 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 8.68 km (#6,000 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0450 |
| Absolute magnitude (H) | 14.47 |
| Orbital period | 5.78 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 3.11 – 3.34 au |
| Eccentricity | 0.0358 |
| Inclination | 9.64° |
| Closest distance between its orbit and Earth's (MOID) | 2.13 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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