Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077
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M 81 & 82 - HaRGB reworked, 



    
        

            gigiastro
M 81 & 82 - HaRGB reworked
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M 81 & 82 - HaRGB reworked

Getting plate-solving status, please wait...
M 81 & 82 - HaRGB reworked, 



    
        

            gigiastro
M 81 & 82 - HaRGB reworked
Powered byPixInsight

M 81 & 82 - HaRGB reworked

Technical card

Imaging telescopes or lenses: Canon EF 400mm f/5,6L USM

Imaging cameras: Canon EOS 60Da

Mounts: iOptron ZEQ25GT

Software: PixInsight  ·  Elements Photoshop

Filters: Astronomik H-alpha 12nm CCD Clip-Filter EOS


Dates:Jan. 15, 2019Feb. 5, 2019

Frames:
730x30" (6h 5') ISO1600
Astronomik H-alpha 12nm CCD Clip-Filter EOS: 490x30" (4h 5') ISO1600

Integration: 10h 10'

Darks: 10

Flats: 30

Flat darks: 12

Bias: 80

Avg. Moon age: 4.56 days

Avg. Moon phase: 31.38%

Bortle Dark-Sky Scale: 8.00

Temperature: 4.00


Basic astrometry details

Astrometry.net job: 4504821

RA center: 9h 55' 20"

DEC center: +69° 16' 44"

Pixel scale: 2.260 arcsec/pixel

Orientation: 356.578 degrees

Field radius: 1.785 degrees


Resolution: 4956x2788

Locations: Home, Mestre, Venezia, Italy

Data source: Backyard

Description

Reprocessing of my 2019 HaRGB photo, to improve the H-alpha component,

mainly with the following procedure in PixInsight:

LRGBCombination

L: HaRGB_G

R: enhanced H-alpha with PhotoShop

G: HaRGB_G

B: HaRGB_B

Channel Weights

L: 0.75

R: 0.88

G: 0.75

B: 0.75

Comments

Sky plot

Sky plot

Histogram

M 81 & 82 - HaRGB reworked, 



    
        

            gigiastro