Observation by Eric Watkins: GK Per. Outburst
Uploaded by
Eric Watkins
Observer
Eric Watkins
Observed
2018 Aug 25 - 01:50
Uploaded
2018 Aug 28 - 00:19
Objects
Variable star
Equipment
- Celestron 14 Edge at F:7.7
- Paramount MEII GEM
- QSI 532 ccd camera
- Astrodon V photometric.
Exposure
60 sec Astrodon gen II V photometric filter
Location
North Essex
Target name
GK Per
Title
GK Per. Outburst
About this image
This is the first time I have imaged a nova, though I recall that at the end of August, 1975 I was looking at Cygnus with the naked eye and thinking there was a star out of place. Had I checked "Norton's Star Atlas" I would have realised I had made an "independent discovery" of a nova
GK Per behaves as a dwarf nova with irregular outbursts, typically at 18-36month intervals, the last being March, 2015.
Following an alert notice from AAVSO of a possible outburst on 21st August. I made this set of observations on the early morning of the 25th, August, 2018.
Using photometric filters with 5 x 60sec exposures each in both V and R together with Astrometrica I determined the following:
Mag V of 12.189 +/- 0.005 (sd) and Mag R of 11.646 +/- 0.018 (sd) with a (V-R) colour of 0.544 +/- 0.02 (sd).
Seeing was variable with passing high thin cloud
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