Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
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M81 as seen from the city of Sofia, 



    
        

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M81 as seen from the city of Sofia
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M81 as seen from the city of Sofia

Technical card

Imaging telescopes or lenses: Celestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8)

Imaging cameras: ZWO ASI 533 MC PRO

Mounts: Ioptron CEM70

Guiding telescopes or lenses: Orion Deluxe Mini 50mm Guide Scope with Helical Focuser

Guiding cameras: ZWO ASI 224MC

Software: PixInsight 1.8  ·  SharpCap

Filters: Celestron LPI Filter for the 8” RASA

Accessory: Celestron Focus Motor


Dates:Feb. 4, 2021Feb. 6, 2021Feb. 13, 2021Feb. 17, 2021

Frames:
Celestron LPI Filter for the 8” RASA: 23x120" (gain: 100.00) -10C bin 1x1
Celestron LPI Filter for the 8” RASA: 84x300" (gain: 100.00) -10C bin 1x1
Celestron LPI Filter for the 8” RASA: 44x300" (gain: 100.00) -20C bin 1x1

Integration: 11.4 hours

Darks: ~20

Flats: ~30

Bias: ~30

Avg. Moon age: 13.24 days

Avg. Moon phase: 28.91%

Bortle Dark-Sky Scale: 6.00


Basic astrometry details

Astrometry.net job: 4231785

RA center: 9h 55' 45"

DEC center: +69° 3' 57"

Pixel scale: 1.939 arcsec/pixel

Orientation: 264.605 degrees

Field radius: 0.593 degrees


Resolution: 1920x1080

Locations: Sofia - Capital of Bulgaria, Sofia, Bulgaria

Data source: Backyard

Description

This is my go at the M81 region during the cold and clear winter nights of February 2021.

Comments

Revisions

  • Final
    M81 as seen from the city of Sofia, 



    
        

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    Original
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    D
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    E

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Description: Topaz Denoise version

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M81 as seen from the city of Sofia, 



    
        

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In these public groups

Celestron RASA
ASI533MC Pro