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Contains:  California nebula, NGC 1499, The star ξPer
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California Nebula (NGC1499) using HaRGB combination, 





    
        

            JDJ
California Nebula (NGC1499) using HaRGB combination

California Nebula (NGC1499) using HaRGB combination

Technical card

Resolution: 1750x2716

Dates:Jan. 28, 2019Feb. 9, 2019

Frames:
Optolong Ha 12nm 2": 33x180" ISO400 bin 2x2
Orion Skyglow 2" Filter: 65x120" ISO200 bin 2x2

Integration: 3.8 hours

Darks: ~22

Flats: ~14

Bias: ~25

Avg. Moon age: 13.44 days

Avg. Moon phase: 30.95%

Astrometry.net job: 2518734

RA center: 60.199 degrees

DEC center: 36.602 degrees

Pixel scale: 4.171 arcsec/pixel

Orientation: 87.449 degrees

Field radius: 1.872 degrees

Data source: Backyard

Description

This image of the California Nebula (NGC1499) was generated using the Pixinsight NBRGB combination script. I'm still learning my way through this technique following the InsidePixInsight book by Warren Keller. Red was augmented by Halpha data with a scale factor of 0.75. Blue was augmented by Halpha data with a scale factor of 0.2 (to simulate Hbeta data). After generating the combined image, I performed some additional post-processing to dial down the red and bring out the nebulocity using Curves transformation, HDR Multiscale tranformation, and a Color Saturation adjustment.

RGB data: OSC RGB data taken on January 28, 2019 with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Orion Skyglow Imaging Filter, and full spectrum modified Nikon D5300.
https://astrob.in/390223/0/

NB data: NB H-alpha data February 9, 2019 with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong 12nm Hydrogen Alpha Filter, and full spectrum modified Nikon D5300.
https://astrob.in/390226/0/

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JDJ
JDJ
License: None (All rights reserved)
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California Nebula (NGC1499) using HaRGB combination, 





    
        

            JDJ