How bright is Asteroid 3200 Phaethon?
The current visual magnitude of Asteroid 3200 Phaethon is 19.51. Given its brightness, Asteroid 3200 Phaethon 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 3200 Phaethon, 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 3200 Phaethon between January 1900 and January 2100