Solar System
Dynamics
Group 		2011 UL21

Asteroid 2011 UL21 is an Apollo asteroid discovered on October 17, 2011 by the Catalina Sky Survey. It has a diameter of about 2.5 kilometers.

Older results based on shorter arcs

Number of original observations: 93
Arc : 2011 10 17 - 2011 11 03
Nominal rms: 0″.36 (185 residuals)

Possible collision: not detected







External links:

2011 UL21 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
2011 UL21 page and Impact Risk page at the NEO Dynamic Site (NEODyS)




Solar System Dynamics & Planetology Group, 2011. All rights reserved