The cataclysmic variable (NA/DQ+UG) GK Per may be going into outburst, according to observations reported to the AAVSO and via [baavss-alert] and [cvnet-outburst]:
2022 Dec 16.71181 12.9 K. Wenzel [AAVSO]
Dec 16.76250 12.9 E. Muyllaert [AAVSO]
Dec 16.7722 13.0 J. Toone [baavss-alert]
Dec 17.35903 12.9 M.Linnolt [AAVSO]
Dec 17.78100 13.0 G. Poyner [AAVSO]
Dec 18.9708 12.57 V G. Hurst [baavss-alert]
Dec 19.74920 12.232 +/-0.007 V F. Dubois [AAVSO]
Dec 19.74992 12.255 +/-0.007 V F. Dubois [AAVSO]
Dec 19.79100 12.5 E. Muyllaert [AAVSO]
Dec 20.594919 119cG Y. Maeda [cvnet-outburst]
Dec 20.8174 12.3 J. Toone [baavss-alert]
Dec 20.8951 12.1 P. B. Withers [baavss-alert]
Please observe GK Per and report your observations to the AAVSO International Database using WebObs (https://www.aavso.org/webobs/). Charts with comparison stars may be created using the AAVSO Variable Star Plotter (VSP; https://app.aavso.org/vsp/).
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
Latest V Mag: 2022/12/23 04:04:16 11.866
About 1 Mag increase since 12/16 measurement of 12.859
Regards,
Brian
RBCA
AAVSO Alert Notice 807 reports on the dwarf nova outburst of the old nova GK Per (N Per 1901). Please see the notice for details and observing instructions.
There are threads for this outburst of GK Per under the following AAVSO forums:
- Cataclysmic Variables: https://www.aavso.org/gk-per-brightening-2022-01
- Time Sensitive Alerts: https://www.aavso.org/gk-per-brightening-2022
Please subscribe to these threads if you are observing GK Per so you can be updated. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ