(9930) Billburrows Main-belt Asteroid
Discovered on 5 February 1984 by E. Bowell at Anderson Mesa.
William E. Burrows (b. 1937), of New York University, is a top authority on space, national security, spy satellites and spy planes. His books are extensively researched and detailed, yet enjoyably readable; they include, among others, Deep Black and Exploring Space. The name was suggested by E. M. Standish.Naming citation (20010705/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Billburrows is today
Seen from above the solar system on 2026-10-14: Billburrows is 2.24 au from the Sun and 3.04 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9930 |
| Provisional designation | 1984 CP |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.75 km (#6,826 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0970 |
| Absolute magnitude (H) | 13.96 |
| Orbital period | 3.80 years |
| Semi-major axis | 2.44 au |
| Perihelion – aphelion | 2.19 – 2.69 au |
| Eccentricity | 0.102 |
| Inclination | 7.47° |
| Closest distance between its orbit and Earth's (MOID) | 1.20 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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