* Astronomy

Dr. Bob Zavala (U.S. Naval Observatory, Flagstaff) has requested AAVSO assistance in obtaining multicolour photometry of the bright triple system b Per in order to prepare for and detect a possible eclipse of the AB components by the C component predicted for 2013 January 23. At 4.5V, b Per, which is also a radio source, is an excellent target for photoelectric photometrists and DSLR observers.
Multi-colour photometric observations are requested during the period 2013 January 23 through 2012 February 04. Based on a revised period of 702.45 ±0.05 days, the next time of minimum light is predicted for UT 2013 January 28 20:24UT ±1.5 hours
The eclipse may last for up to four days

Source