Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  NGC 3031
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M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
M81 LHaRGB with a hint of IFN
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M81 LHaRGB with a hint of IFN

Technical card

Imaging telescopes or lenses: Astro-Tech AT10RCCF

Imaging cameras: QSI 640 wsg-8

Mounts: AP900GTO

Guiding telescopes or lenses: Astro-Tech AT10RCCF

Guiding cameras: starlight Xpress lodestar

Focal reducers: CCDT67

Software: Maxim DL5  ·  photoshop cs5  ·  FocusMax  ·  bf-astro Excalibrator  ·  CCD Commander  ·  Foster systems Roof controller  ·  ccdstack 2.0

Filters: Astrodon LRGB CCD Imaging Filters (I-Series)  ·  Astrodon H-alpha 5nm


Dates:Feb. 12, 2015

Frames: 182x300"

Integration: 15.2 hours

Avg. Moon age: 22.49 days

Avg. Moon phase: 46.38%

Bortle Dark-Sky Scale: 5.00


Basic astrometry details

Astrometry.net job: 616735

RA center: 9h 55' 34"

DEC center: +69° 4' 8"

Orientation: 89.432 degrees

Field radius: 0.441 degrees


Resolution: 2021x1989

Locations: Home Observatory, Glenwood, Maryland, United States

Description

M81 from the backyard stretched just enough to show a hint of the surrounding IFN. I could stretch it further, but with the poor skies here it kind of muddies up the image further and detracts from the main event (m81). Seeing in the low 3s FWHM for most of it. Ha added at 32% of the red channel. Had a little bit of a flat issue on the far right side of the image.

Original image = Ha 10 x1200 1x1
Image B = LHaRGB
Image C - Enhanced the HII region in Holmberg IX area

Lum = 90 x 300 1x1
Red = 18 x 300 Red 2x2 + 10 x 1200 Ha (32%) 1x1
Green = 16 x 300 2x2
Blue = 18 x 300 2x2

Comments

Revisions

  • M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    Original
  • M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    B
  • M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    C
  • M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    D
  • M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    E
  • Final
    M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)
    F

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M81 LHaRGB with a hint of IFN, 



    
        

            John D (jaddbd)

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