Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J16103359-0102227

TCP J16103359-0102227   2019 01 18.8433*  16 10 33.59 -01 02 22.7  10.4 U             Ser       9 0

2019 01 18.843

Discovered by H. Nishimura, Shizuoka-ken, Japan, on three frames with 30 second exposure using a Canon EOS 6D digital camera + 200-mm f/3.2 lens under the limiting mag = 16, who writes nothing is visible at this location on a frame taken on the last morning, 2019 Jan. 17.841 UT with same limit mag. and there is a variable star (mag = 18.8 to 19.2) in AAVSO catalog.

2019 01 18.83853

Seiichi Yoshida (http://www.aerith.net) reported ~1 hour earlier that "Masaru Mukai found an outburst of V386 Ser up to 10.7 mag at Jan. 18.83853 (UT). It was faint on Jan. 17." (vsnet-alert message #22943, 2019 Jan. 18 at 22:04:57 UTC). This is the first recorded outburst of V386 Serpentis, a likely WZ Sge-type dwarf nova. Time-resolved photometry is urgently required. --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)

2019 01 18.843

There is a discovery image at http://www.oaa.gr.jp/~oaacs/image/TCP201901inSer.jpg.

2019 01 19.828

Mag.= 11.1, position end figures 33s.60, 23".1 observed by T. Noguchi, Chiba-ken, Japan.