Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5473  ·  NGC 5477  ·  NGC 5485
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M101, 



    
        

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M101
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M101

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M101, 



    
        

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M101
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M101

Technical card

Imaging telescopes or lenses: Williams Optics Zenithstar 105 ED Triplet APO

Imaging cameras: ZWO ASI1600mm Pro Cooled

Mounts: Orion Atlas AZ/EQ Pro

Guiding telescopes or lenses: 9x50 Finder Scope

Guiding cameras: QHY5L-II-M

Focal reducers: William Optics 0.8x Reducer/Flattener Flat6A II

Software: KStars Ekos/INDI, Stellarmate OS  ·  PixInsight 1.8

Filters: Astronomik Blue 31mm  ·  Astronomik Green 31mm  ·  Astronomik Red 31mm


Dates:April 9, 2019

Frames:
Astronomik Blue 31mm: 60x120" (2h) (gain: 75.00) -25C bin 1x1
Astronomik Green 31mm: 59x120" (1h 58') (gain: 75.00) -25C bin 1x1
Astronomik Red 31mm: 60x120" (2h) (gain: 75.00) -25C bin 1x1

Integration: 5h 58'

Darks: ~25

Flats: ~25

Bias: ~100

Avg. Moon age: 3.99 days

Avg. Moon phase: 16.99%

Bortle Dark-Sky Scale: 5.33


Basic astrometry details

Astrometry.net job: 2660944

RA center: 14h 3' 17"

DEC center: +54° 20' 38"

Pixel scale: 0.667 arcsec/pixel

Orientation: 29.761 degrees

Field radius: 1.067 degrees


Resolution: 9234x6866

Data source: Backyard

Description

M101 using RGB filters from my backyard on April 9 between 10pm and 5am. Moon set just after midnight.

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    Original
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