(15964) Billgray Inner Main-belt Asteroid
Discovered on 19 February 1998 by J. M. Roe at Oaxaca.
Bill Gray (b. 1965) has made several contributions to astrometry, in particular with his Guide series of starcharting software, his Charon astrometry program and his reduction of the GSC 1.1 star catalog to the ACT frame (GSC-ACT).Naming citation (20001013/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Billgray is today
Seen from above the solar system on 2026-10-14: Billgray is 1.99 au from the Sun and 1.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15964 |
| Provisional designation | 1998 DU |
| Orbit class | Inner Main-belt Asteroid |
| Rotation period | 3.57 hours |
| Absolute magnitude (H) | 15.07 |
| Orbital period | 2.73 years |
| Semi-major axis | 1.95 au |
| Perihelion – aphelion | 1.77 – 2.13 au |
| Eccentricity | 0.0920 |
| Inclination | 18.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.849 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Bill
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All asteroids named after someone called Bill