GK Per may be going into outburst

Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 12/20/2022 - 22:39

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

Affiliation
American Association of Variable Star Observers (AAVSO)
GK Per magnitude increasing

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

Affiliation
American Association of Variable Star Observers (AAVSO)
GK Per outburst - Alert Notice 807

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