British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Eric Watkins

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

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

Files associated with this observation
Like this image
Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.