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Abell 21 / Sharpless 2-274

Technical card


Dates:Dec. 3, 2019Dec. 27, 2019

Frames:
Optolong H-alpha 7nm 2": 60x120" (gain: 200.00) 5C bin 1x1
Optolong OIII 12nm 2": 60x120" (gain: 200.00) 5C bin 1x1

Integration: 4.0 hours

Darks: ~20

Avg. Moon age: 3.98 days

Avg. Moon phase: 22.19%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 3142889

RA center: 7h 29' 0"

DEC center: +13° 15' 32"

Pixel scale: 1.210 arcsec/pixel

Orientation: 359.821 degrees

Field radius: 0.364 degrees


Resolution: 1809x1191

Locations: Western Hungary, Páli, Hungary

Data source: Backyard

Description

This is the first time I imaged Abell 21. Finally I could finish the OIII images.
This last session was again a frustrating job. Since I have the new laptop with win 10, often happens that the laptop loses connection to the mount. Than I have to swich off everything and must restart the laptop. With my old win 7 laptop I had never any problem.
Win 10 sucks !!

Comments

Author

sky-watcher
sky-watcher (johny)
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Abell 21 /  Sharpless 2-274, 



    
        

            sky-watcher (johny)