(11712) Kemcook Main-belt Asteroid
Discovered on 25 April 1998 by LONEOS at Anderson Mesa.
Kem H. Cook (b. 1949), of Lawrence Livermore National Laboratory, is a founding member of the Massive Compact Halo Objects (MACHO) Project, which used a refurbished, 120-year-old telescope (The Great Melbourne Telescope) to survey the Magellanic Clouds for gravitational microlensing by baryonic, halo dark matter.Naming citation (20010705/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Kemcook is today
Seen from above the solar system on 2026-10-14: Kemcook is 2.58 au from the Sun and 3.34 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11712 |
| Provisional designation | 1998 HB51 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.66 km (#11,310 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.186 |
| Absolute magnitude (H) | 14.14 |
| Orbital period | 4.21 years |
| Semi-major axis | 2.61 au |
| Perihelion – aphelion | 2.37 – 2.85 au |
| Eccentricity | 0.0911 |
| Inclination | 3.21° |
| Closest distance between its orbit and Earth's (MOID) | 1.38 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Lawrence
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- (45688) Lawrencestacey
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- (154938) Besserman
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Also discovered on 25 April 1998
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