Skip to main content


Alert Notice 476: Multicolor photometry of triple system b Per requested

January 4, 2013: Dr. Bob Zavala (U.S. Naval Observatory, Flagstaff) has requested AAVSO assistance in obtaining multicolor 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.

Citizen Sky Workshop to Produce a DSLR Photometry Manual

The Citizen Sky Project - Workshop III

Sponsored by:
The National Science Foundation and
The American Association of Variable Star Observers

When and Where:

The 3rd Citizen Sky Project Workshop will be held Friday-Sunday, March 22-24 at AAVSO Headquarters in Cambridge, MA.  We will kick-off the 3-day workshop with a meet-and-greet the evening of Thursday, March 21st. 

Goals and Structure:

Alert Notice 472: Monitoring of HD 5980 requested for multiwavelength campaign

October 19, 2012:  Dr. Noel Richardson (Universite de Montreal, formerly at Georgia State University) has requested monitoring of the Small Magellanic Cloud eclipsing binary HD 5980 (in Tucana) as part of a multiwavelength campaign he is coordinating to study this unusual system. Dr. Richardson writes:

The Trapezium, BM Orionis, and Young Stellar Objects

Just over one year ago, a small spacecraft called MOST began a month-long observing run on one of the most spectacular objects in Earth's skies, the beautiful Trapezium region at the heart of the Orion Nebula, M42.  My collaborators and I applied for and received this observing time to survey variability in this young stellar cluster -- partly to study the eclipsing binary BM Ori (theta 01 Orionis B), but also to survey as many young stars that we were able to using the unique capabilities of MOST.  Since then, I along with my collaborators -- our Director Arne H


AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484