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NGC 6992 (Cyg)
Click on the image for a larger version
| 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 |
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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.
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© Friedhelm Hübner, last revision: 03.12.2023