How bright is Asteroid 90377 Sedna (2003 VB12)?
The current visual magnitude of Asteroid 90377 Sedna (2003 VB12) is 20.81. Given its brightness, Asteroid 90377 Sedna (2003 VB12) 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 90377 Sedna (2003 VB12), 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.