(15522) Trueblood Main-belt Asteroid
Discovered on 14 December 1999 by C. W. Juels at Fountain Hills.
Mark Trueblood (b. 1948) managed the Hubble Space Telescope control center at Ford Aerospace Corporation and now manages the U.S. Gemini instrument program at the National Optical Astronomy Observatory. He built and operates Winer Observatory in Sonoita, Arizona, as a service to the astronomical community.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Trueblood is today
Seen from above the solar system on 2026-10-14: Trueblood is 2.31 au from the Sun and 2.95 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15522 |
| Provisional designation | 1999 XX136 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 7.18 hours |
| Absolute magnitude (H) | 14.67 |
| Orbital period | 3.53 years |
| Semi-major axis | 2.32 au |
| Perihelion – aphelion | 2.03 – 2.61 au |
| Eccentricity | 0.126 |
| Inclination | 9.84° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Mark