(129333) Ashleylancaster Main-belt Asteroid

Discovered on 23 October 2005 by CSS at Catalina.

Ashley Lancaster (b. 1990) worked as a test engineer on the OSIRIS-REx Asteroid Sample Return Mission OCAMS camera. She also worked on the ATST Solar Telescope.Naming citation (MPC batch dated 2016-08-18), IAU / Minor Planet Center, via NASA/JPL

Where Ashleylancaster is today

MercuryVenusEarthEarthMarsMarsAshleylancasterAshleylancaster

Seen from above the solar system on 2026-10-14: Ashleylancaster is 2.66 au from the Sun and 1.97 au from Earth. Computed from JPL's orbital elements.

Facts

Number129333
Provisional designation2005 UR55
Orbit classMain-belt Asteroid
Diameter5.87 km (#9,128 largest of 17,440 named asteroids with a measured size)
Albedo0.0510
Absolute magnitude (H)15.31
Orbital period5.43 years
Semi-major axis3.09 au
Perihelion – aphelion2.52 – 3.66 au
Eccentricity0.185
Inclination1.35°
Closest distance between its orbit and Earth's (MOID)1.52 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

Also named after someone called Ashley

Also discovered on 23 October 2005

More named asteroids discovered by CSS