[vsnet-alert 21412] V742 Lyr fading

[Taichi Kato]

V742 Lyr fading

   From [baavss-alert] V742 Lyr (Gary Poyner)

> The RCB star V742 Lyr (NSV 11154) is fading...
>
> Aug 28.935     12.5 vis
> Aug 30.997     12.5 vis
>
> Sep 07.047     14.01V    COAST telescope
>
> AAVSO IDB indicates that the fade begun on Aug 31.93 at 13.35V (T. Karlsson)
>
> The last fade occurred in March 2015.
>
> V742 Lyr was identified as an RCB star as recently as 2011...

  Thomas Karlsson and Hiraga-san already detected the start of
fading on Aug. 23-24.

  YYYYMMDD(UT)   mag  observer
  20170810.028   123  (Gary Poyner)
  20170811.601  122V  (Masayuki Moriyama)
  20170811.649  124c  (Mitsutaka Hiraga)
  20170812.919   123  (Eddy Muyllaert)
  20170815.894   123  (Eddy Muyllaert)
  20170815.962   124  (Gary Poyner)
  20170816.965  124V  (Thomas Karlsson)
  20170818.904   124  (Eddy Muyllaert)
  20170819.885   123  (Eddy Muyllaert)
  20170821.487  12.64cG  (Makoto Watanabe)
  20170823.942   124  (Gary Poyner)
  20170823.986  127V  (Thomas Karlsson)
  20170824.542  128c  (Mitsutaka Hiraga)
  20170824.949   124  (Eddy Muyllaert)
  20170826.553  129c  (Mitsutaka Hiraga)
  20170826.932   125  (Gary Poyner)
  20170826.955   123  (Eddy Muyllaert)
  20170827.938   124  (Eddy Muyllaert)
  20170828.603  131c  (Mitsutaka Hiraga)
  20170828.935   125  (Gary Poyner)
  20170830.923   125  (Gary Poyner)
  20170831.549  134c  (Mitsutaka Hiraga)
  20170831.876   124  (Eddy Muyllaert)
  20170831.928  13.35V  (Thomas Karlsson)
  20170902.896   124  (Eddy Muyllaert)
  20170907.047  14.01V  (Gary Poyner)