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21P: brightening nicely

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About this observation
Observer
David Swan
Time of observation
10/08/2018 - 22:15
Object
21P/Giacobini-Zinner
Observing location
Tynemouth, UK
Equipment
200mm SCT @ f/7
ASI183MM
Baader UV+IR cut
FireCapture, DeepSkyStacker and Astrometrica
Comphot
Exposure
33 x 20s
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The coma is estimated to have a diameter of just over 9 arcmin.

10x10  20x20  30x30  40x40  50x50  60x60

 11.00  10.15   9.72   9.43   9.22   9.05 # Counts

 11.00  10.20   9.76   9.47   9.26   9.09 # Median annuli

Total integrated magnitude: 7.92 (radius 270.7 arcsec)

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