(121540) Jamesmarsh Main-belt Asteroid
Discovered on 31 October 1999 by CSS at Catalina.
Jimmy Marsh (b. 1969) contributed to the NASA OSIRIS-REx Asteroid Sample Return Mission as Proposal Manager.Naming citation (MPC batch dated 2016-08-18), IAU / Minor Planet Center, via NASA/JPL
Where Jamesmarsh is today
Seen from above the solar system on 2026-10-14: Jamesmarsh is 2.37 au from the Sun and 1.85 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 121540 |
| Provisional designation | 1999 UU51 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.86 |
| Orbital period | 4.63 years |
| Semi-major axis | 2.78 au |
| Perihelion – aphelion | 2.36 – 3.19 au |
| Eccentricity | 0.149 |
| Inclination | 10.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.35 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jimmy
All asteroids named after someone called Jimmy
Also discovered on 31 October 1999
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