Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Bode's galaxy  ·  Cigar Galaxy  ·  Cigar galaxy  ·  M 81  ·  M 82  ·  M81  ·  M82  ·  NGC 3031  ·  NGC 3034  ·  NGC 3077  ·  NGC2959  ·  NGC2961  ·  NGC3077
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M 81 & M 82, 



    
        

            Elmiko
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M 81 & M 82

Technical card

Imaging telescopes or lenses: Astrotech 92 Triplet AT92mm f/5.5

Mounts: Orion Azeq Atlas pro

Guiding telescopes or lenses: ASTRO TECH AT66ED Guiding

Guiding cameras: ZWO ASI071MC PRO CMOS OSC

Focal reducers: Astro Tech Field flattener

Software: PixInsight  ·  Stark Labs pHD guiding PHD2  ·  EQMOD, Stellarium, Stellarium Scope, PHD, Backyard EOS, Astro Tortilla Nebulosity 4

Filters: Zwo Filter Drawer  ·  Optolong UV-IR

Accessory: Thousand Oaks Dew Controller  ·  Pegasus Astro Dual Motor Focus Controller Cube focuser


Dates:Feb. 11, 2021Feb. 18, 2021

Frames:
Optolong L-eXtreme 2": 27x600" (gain: 90.00) -10C
Optolong UV-IR: 30x180" (gain: 90.00) -10C
Optolong UV-IR: 36x300" (gain: 90.00) -10C

Integration: 9.0 hours

Darks: ~30

Flats: ~20

Bias: ~50

Avg. Moon age: 17.75 days

Avg. Moon phase: 19.05%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 18.48


Astrometry.net job: 4235523

RA center: 9h 55' 40"

DEC center: +69° 1' 7"

Pixel scale: 0.968 arcsec/pixel

Orientation: 39.216 degrees

Field radius: 1.315 degrees


Resolution: 6137x7618

Locations: Picket Post Bortle 4, Superior, Arizona, United States

Data source: Traveller

Description

I wanted to image this object again to see if I could improve it. I think I succeeded. It's only 4.5 hours but from the dark site. I purposely Left the background on the lighter side to try and reveal the IFN in the region. I obviously need more time on it to show more of it. Getting colorful stars are difficult in this area, I'm thinking because of the nebulosity in the region. I am happy that I captured a lot of distant background Galaxies too, if you scan the lower half of the frame.

Comments

Revisions

  • M 81 & M 82, 



    
        

            Elmiko
    Original
  • M 81 & M 82, 



    
        

            Elmiko
    C
  • M 81 & M 82, 



    
        

            Elmiko
    D
  • Final
    M 81 & M 82, 



    
        

            Elmiko
    E

C

Description: Added 4.5 hours of L-eXtreme data. To bring out more of the H-a regions in M 81. Also reduced the stars a bit.

Uploaded: ...

D

Description: Cropped bad left edge

Uploaded: ...

E

Description: Made a colorMask to isolate the H-a region to give a boost of color and definition.

Uploaded: ...

Sky plot

Sky plot

Histogram

M 81 & M 82, 



    
        

            Elmiko