[vsnet-alert 25917] TCP J09430280+2758080 orbital period

[Denis Denisenko d.v.denisenko@gmail.com via vsnet-alert]

Following [vsnet-alert 25916].

The object was observed in quiescence more than 400 times by Catalina
Realtime Transient Survey (Drake et al., 2009) and more than 1000 times by
ATLAS (Tonry et al., 2018). The best period from the combined data is
P=0.1815698 d and the Epoch of minimum is JD=2457827.094 (MJD=57826.594).
Phase plot from CSS data:
http://scan.sai.msu.ru/~denis/J0943+2758-CSS-phased_LC.gif

The variable looks like an UGSS dwarf nova. SDSS colors (u-g=0.80,
g-r=0.86, r-i=0.38) are in agreement with the long period.

Detection by ATLAS (Tonry et al., 2018):

TCP J09430280+2758080
  20210525.2649  18.12o  ATLAS last non-detection
  20210529.2803  14.29o  ATLAS Outburst
  20210529.3028  14.28o  ATLAS

Denis Denisenko