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Imaged January 19th and 20th 2018, near Cambridge UK.
Image Details:
4 hours 50 mins total exposure.
12 x 600s Luminance 1x1 (2 hours)
11 x 300s Red 1x1 (55mins)
12 x 300s Green 1x1 (1 hours)
11 x 300s Blue 1x1 (55mins)
Scope - Altair Astro Wave Series 115mm Refractor, Planostar 0.79x reduced to 642mm/F5.54.
Sensor - Atik 383l+ Mono CCD + Baader Ha/OIII/SII filters. -20degC.
Scale - 1.73 arcsec/pixel.
Mount - Altair Astro Pier mounted iOptron CEM60.
Guiding - Lodestar X2 and SX OAG with PHD2.
Sequence Generator Pro and PixInsight.
Thanks for looking.
Things are looking up at Chester Cathedral. The purple lighting seems to have been there in connection with the big, inflatable earth display - but I may be wrong.
Testing out my new toy I was.