How bright is Asteroid 14 Irene?
The current visual magnitude of Asteroid 14 Irene is 9.34. Given its brightness, Asteroid 14 Irene should be visible with the help of a binocular with a 50mm aperture, easy with a small telescope.
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 14 Irene, 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 14 Irene between
January 2013 and December 2100