How bright is Asteroid (NEO) 2010 RA91?
The current visual magnitude of Asteroid (NEO) 2010 RA91 is 25.58. Given its brightness, Asteroid (NEO) 2010 RA91 should be visible only through long exposure photography.
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2010 RA91, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Predicted magnitude of Asteroid (NEO) 2010 RA91 between January 2013 and December 2100