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M 51 - "The Whirlpool Galaxy" in Canes Venatici

Technical card

Resolution: 2424x1650

Dates: April 20, 2015April 22, 2017

Frames:
Astronomik EOS Clip CLS: 227x30" ISO1600
Astronomik EOS Clip CLS: 539x20" ISO2500

Integration: 4.9 hours

Darks: ~10

Flats: ~40

Avg. Moon age: 13.00 days

Avg. Moon phase: 13.45%

Bortle Dark-Sky Scale: 8.00

Temperature: 6.50

Astrometry.net job: 1575087

RA center: 202.455 degrees

DEC center: 47.205 degrees

Pixel scale: 1.043 arcsec/pixel

Orientation: 178.689 degrees

Field radius: 0.425 degrees

Locations: Home, Venezia, Venice, Italy

Description

Severe light pollution:
darkness of observing site: Bortle's class 8
seeing 3 (Antoniadi)
cropped area (2424x1650) from original picture of 5202x3465 resolution
227x30s ISO 1600 113min [2015-04-20, 400mm]
10 dark
no flat
no bias
539x20s ISO 2500 180min [2017-04-22, 850mm]
10 dark
40 flat
no bias
(unguided)

Comments

Author

gigiastro
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M 51 - "The Whirlpool Galaxy" in Canes Venatici, gigiastro