(381725) Bobrinsky Main-belt Asteroid
Discovered on 13 September 2009 by ESA OGS at ESA OGS.
Nicolas Bobrinsky (b. 1958) is a French spaceflight engineer who served as first program manager of ESA’s Space Situational Awareness Programme in 2009. He laid the foundation for planetary defense efforts, which have since expanded to include new survey capabilities, an impact assessment team, and the Hera planetary defense mission.Naming citation (WGSBN Bull. 5, #4, 34), IAU / Minor Planet Center, via NASA/JPL
Where Bobrinsky is today
Seen from above the solar system on 2026-10-14: Bobrinsky is 2.19 au from the Sun and 3.09 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 381725 |
| Provisional designation | 2009 RP5 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 17.8 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 1.83 – 2.87 au |
| Eccentricity | 0.221 |
| Inclination | 1.53° |
| Closest distance between its orbit and Earth's (MOID) | 0.819 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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