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SH-2 155 Cave Nebula in Cepheus (RGB)

Technical card

Resolution: 3379x2798

Dates: Oct. 14, 2015

Frames: 42x500"

Integration: 5.8 hours

Avg. Moon age: 0.90 days

Avg. Moon phase: 0.91%

Astrometry.net job: 847501

RA center: 344.040 degrees

DEC center: 62.378 degrees

Pixel scale: 1.436 arcsec/pixel

Orientation: 179.644 degrees

Field radius: 0.875 degrees

Locations: The Hills Observatory, Manchester, United Kingdom

Description

I have not been posting images for a while as I have been rather busy - building an observatory. It took rather longer than I thought it would being 11 months since I started the pier foundations. But it's worth it, now I can get imaging a lot faster and be protected from the wind as well as allowing me to stay warm while imaging.

This image, the Cave Nebula is my first light from the observatory.

I am really surprised how well this has turned out as I live in light polluted Manchester, UK and I have only used R, G & B filters. I was also going to take Ha subs, but I don't think I need to. The average SQM reading was 18.7.

The actual sub exposures over 3 nights were:
Red 6x300s bin 2x2 + 9x600s bin 1x1
Green 5x300s bin 2x2 + 10x600s bin 1x1
Blue 3x300s bin 2x2 + 9x600s bin 1x1

The updated version is the same image with a different border which is now the format I intend to keep.

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Author

Mike Oates
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SH-2 155 Cave Nebula in Cepheus (RGB), Mike Oates