I did a 30 second Johnson V filtered image of V339 DEL with the Sierra Stars 24" last night. Using VPHOT with a six star ensemble and the 126 comp as the check star, I got a magnitude of 12.911 V versus 12.649 V for the 126 comp. I subsequently deleted this star as my check star. Is this star variable? Has anyone else noticed any magnitude divergence of this comp over time? With V339 DEL currently around 12.5 V, this could be an issue for recent, current and future photometry.
Regards, Kevin Paxson - PKV