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SH2-129 Flying Bat and OU-4 Squid Nebulae with RGB stars, 



    
        

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SH2-129 Flying Bat and OU-4 Squid Nebulae with RGB stars

Getting plate-solving status, please wait...
SH2-129 Flying Bat and OU-4 Squid Nebulae with RGB stars, 



    
        

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Powered byPixInsight

SH2-129 Flying Bat and OU-4 Squid Nebulae with RGB stars

Acquisition details

Dates:
June 17, 2022 ·  June 18, 2022 ·  June 20, 2022 ·  June 21, 2022 ·  June 22, 2022 ·  June 24, 2022 ·  June 25, 2022 ·  June 26, 2022 ·  June 27, 2022 ·  June 28, 2022 ·  June 29, 2022 ·  June 30, 2022 ·  July 1, 2022 ·  July 2, 2022 ·  July 3, 2022
Frames:
Astronomik Deep-Sky Blue: 10×300(50′) (gain: 120.00) -10°C bin 2×2
Astronomik Deep-Sky Green: 10×300(50′) (gain: 120.00) -10°C bin 2×2
Astronomik Deep-Sky Red: 10×300(50′) (gain: 120.00) -10°C bin 2×2
Astronomik H-alpha CCD 6nm 1.25": 219×300(18h 15′) (gain: 120.00) -10°C bin 2×2
Astronomik OIII CCD 6nm: 321×300(26h 45′) (gain: 120.00) -10°C bin 2×2
Astronomik OIII CCD 6nm: 146×600(24h 20′) (gain: 120.00) -10°C bin 2×2
Integration:
71h 50′
Avg. Moon age:
16.79 days
Avg. Moon phase:
25.08%
Bortle Dark-Sky Scale:
5.00

RA center: 21h11m44s.65

DEC center: +59°5846.3

Pixel scale: 3.288 arcsec/pixel

Orientation: 157.177 degrees

Field radius: 1.412 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2560x1735

File size: 5.6 MB

Data source: Backyard

Description

Two years into the hobby, I decided to take on the challenge. This is by far the most demanding project for me. I knew the squid is an extremely faint emission nebula before started. However, it's more difficult than I expected. It was hard to get enough photons in a single 10 min sub using a f/5.3 scope and under Bortle 5/6 skies. The weather in Northern California was almost perfect in the past 20 days or so. Cloud coverage was constantly around or below 6-8%, the worst being 12-15%. 

Apart from a guiding issue I still need to sort out, imaging went smoothly. Processing the data, however, is another story. For my setup, the signal for the squid is not much above the background noise level. Stretching the squid without blowing up the noise was really pushing my processing skills to the limit. I ended up using a mask in order to suppress the noise in the nonlinear stage. All in all, this was a wonderful journey.

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SH2-129 Flying Bat and OU-4 Squid Nebulae with RGB stars, 



    
        

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