WR 140

AAVSO Alert Notice - Observing Campaign #865: Photometry and Spectroscopy of WR 140 (V1687 Cyg) through its upcoming periastron

September 10, 2024

Campaign continued through 2017. Also, updated in Special Notice #419 (20160809) to encourage spectroscopy. 

August 3, 2016: Dr. Noel Richardson (University of Toledo) and colleagues have requested AAVSO assistance in optical monitoring of the bright, colliding-winds binary V1687 Cyg (WR 140, HD 193793) as part of their multi-wavelength campaign on this system.