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Contains:  Sh2-155
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Cave Nebula in H alpha, 


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Cave Nebula in H alpha

Technical card

Dates:Sept. 13, 2018Sept. 17, 2018

Baader Planetarium B 1" 1/4: 17x60" -10C bin 1x1
Baader Planetarium G 1" 1/4: 17x60" -10C bin 1x1
Baader Planetarium Ha 1.25" 7nm: 34x300" -10C bin 1x1
Baader Planetarium R 1 1/4": 17x60" -10C bin 1x1

Integration: 3.7 hours

Darks: ~1

Flats: ~10

Bias: ~1

Avg. Moon age: 5.96 days

Avg. Moon phase: 36.27%

Temperature: 20.00 job: 2356371

RA center: 22h 57' 8"

DEC center: +62° 37' 35"

Pixel scale: 0.544 arcsec/pixel

Orientation: -79.033 degrees

Field radius: 0.218 degrees

Resolution: 1818x2232

Locations: Crique Campsite, Southern France, Perpignon, France

Data source: Traveller


The main data set is narrowband H alpha. I took some brief subs in RGB to get the star field and allow rendering in red/orange. I like a visual link between Ha and red ...
I mixed the RGB(stars) and Ha by reducing the star brightness in the latter, and then using NBRGB in PI.



License: None (All rights reserved)

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Sky plot


Cave Nebula in H alpha, 



In these public groups

UK Astro-Imaging