Crescent Nebula aka NGC6888

2020

Apr 11

Triple shot combination in H Alpha, OIII and RGB late October 2019.
Crescent Nebula, NGC6888, remnant of an ancient supernova in the Swan constellation, just below the bright star Sadr.

Shooting on 29-9, 30-9, 02-10 from a 5.5 bortle sky

Setup

TS Photoline 72/432 flattened 1x

HEQ5, ASI 294 mc pro cooled to -10 °

Drive with Artesky 60/240 and ASI 224 mc

18x600 "with baader HA 7nm

18x600 "with baader OIII 8,5nm

24x300 "in RGB with Optolong L pro 2"

gain 120 + dark, flat and dark flat no bias

acquisition with APT, PHD2, Synscan Mobile app

Pixinsight 1.8 and Photoshop 2018 processing

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