How bright is Asteroid (NEO) 2017 WJ16?
The current visual magnitude of Asteroid (NEO) 2017 WJ16 is 16.19. Given its brightness, Asteroid (NEO) 2017 WJ16 should be visible with the help of a telescope havng an aperture of 20 inches (500mm) or more.
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2017 WJ16, 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.