• AAVSO
  • Dr. Bob Zavala (U.S. Naval Observatory, Flagstaff) requested AAVSO assistance in obtaining multicolor photometry in order to prepare for and detect a possible eclipse of the AB components by the C component. (aavso.org)
  • The AAVSO is rebuilding its CCD Observing Manual from the ground up, including a change of title: the Guide to CCD Photometry. (aavso.org)
  • cover
  • Photometry - multicolor if possible - is urgently needed now to cover the rest of this eclipse, which may last for up to four days altogether, and see post-eclipse behavior of the system. (aavso.org)