In VSNET-CHAT, Dr. Kato wrote : R CrB: how deep was the deepest minimum?
According to the GCVS, the minimum magnitude of R CrB is given as 14.8v
(possibly a visual magnitude). The star doesn't seem to have reach far
fainter than V=14.0 recently. Could there have been a real such a deep
minimum in the past, or could it have been a systemtic difference between the
old and new comparison stars? Regards, Taichi Kato
In our AFOEV database for R CrB (59048 observations) one can find
mv 14.1 51422 Ripero Jose
mv 14.0 51422.3 Verdenet Michel
51422.4 Verdenet Michel
51478 Verdenet Michel
mv 13.9 45631 Feijth Henk
51420 Verdenet Michel
51421 Ripero Jose
51427 Vohla Frank
51476 Muyllaert Eddy
sequence most AFOEV=AAVSO or AAVSO charts
E. Schweitzer AFOEV
afoevb@aol.com
vsnet-adm@kusastro.kyoto-u.ac.jp