(333001) Calloway Outer Main-belt Asteroid
Discovered on 11 September 2007 by Mt. Lemmon Survey at Mount Lemmon.
Andrew Calloway (b. 1967) was the Mission Operations Manager for the US OSIRIS-REx Asteroid Sample Return mission. He was the Operations Manager for the MESSENGER mission to Mercury and the Deputy Encounter Manager for the New Horizons Pluto Flyby. He also worked on the Tropical Rainfall Measuring Mission.Naming citation (WGSBN Bull. 6, #12, 5), IAU / Minor Planet Center, via NASA/JPL
Where Calloway is today
Seen from above the solar system on 2026-10-14: Calloway is 3.25 au from the Sun and 3.03 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 333001 |
| Provisional designation | 2011 HB38 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 3.55 km (#13,818 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0610 |
| Absolute magnitude (H) | 15.83 |
| Orbital period | 5.86 years |
| Semi-major axis | 3.25 au |
| Perihelion – aphelion | 3.14 – 3.36 au |
| Eccentricity | 0.0332 |
| Inclination | 10.2° |
| Closest distance between its orbit and Earth's (MOID) | 2.15 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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