[vsnet-rcb 779] Z UMi: start to fade?

[Ohshima]

Z UMi: start to fade?

 The RCB type star Z UMi seems to have started to fading.
The last fading started on 2007 Jan, the faintest magnitude
reached 19 mag.

Recent observations;
  20110103.819   111  (Gary Poyner)
  20110108.788   111  (Gary Poyner)
  20110109.778   111  (Gary Poyner)
  20110116.865   111  (Gary Poyner)
  20110127.838   112  (Chris Allen)
  20110130.753   112  (Wolfgang Kriebel)
  20110130.771   114  (Chris Allen)
  20110130.801   111  (Gary Poyner)
  20110201.792   110  (Gary Poyner)
  20110207.828   111  (Gary Poyner)
  20110208.753   116  (Wolfgang Kriebel)
  20110211.000   118  (J. Bortle)