How bright is Asteroid 2016 WF9?
The current visual magnitude of Asteroid 2016 WF9 is 26.19. Given its brightness, Asteroid 2016 WF9 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 2016 WF9, 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 2016 WF9 between January 2013 and December 2100