NGC 6992 (Cyg)

NGC 6992 (Cyg)

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Date/Site: 23. August 2016, AAR-observatory in Presberg
Exposure/
Filter:
Hα 9 x 600 seconds,
O3 11 x 600 seconds (-20°C)
Camera: QSI 632 with SBIG- and Baader-filters
off-axis-guiding with Lodestar
Optics/
Instrument:
10" f4-Newton on AP1200, RCC1 coma-corrector
Focusing with RoboFocus and FocusMax,
automatic image acquisition with CCD-Commander and MaximDL 6,
calibration: MaximDL 6, processing: PixInsight 1.8

Following the modified bicolor technique by Steve Cannistra and especially Gerhard Wechselberger's Pixelmath-implementation in PixInsight for combining Hα- and OIII-frames I created a synthetic green channel from the narrowband-channels and combined them to a RGB-image, thereby enhancing the emission nebulae.

© Friedhelm Hübner, last revision:  03.12.2023