Hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7741
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NGC 7741 LHaRGB, 



    
        

            John D (jaddbd)
NGC 7741 LHaRGB
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NGC 7741 LHaRGB

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

Software: photoshop cs5  ·  FocusMax  ·  bf-astro Excalibrator  ·  CCD Commander  ·  Cyanogen Maxim DL6  ·  Foster systems Roof controller  ·  ccdstack 2.0

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


Dates:Nov. 3, 2017

Frames: 189x600"

Integration: 31.5 hours

Avg. Moon age: 13.95 days

Avg. Moon phase: 99.25%

Bortle Dark-Sky Scale: 5.00


Basic astrometry details

Astrometry.net job: 1846849

RA center: 23h 43' 52"

DEC center: +26° 4' 33"

Pixel scale: 0.765 arcsec/pixel

Orientation: 270.586 degrees

Field radius: 0.276 degrees


Resolution: 1962x1703

Locations: Home Observatory, Glenwood, Maryland, United States

Description

Ngc 7741 in Pegasus. 47 MLY away. Data fro last season and this season. Did not get around to the color and Ha until this year. I ended up with way more data than I planned as I accidentally ran the lum script for this one for 5 extra nights this year thinking I was imaging another object as I saved script under the wrong name and did not check on data 'till the next week... Duh!. There is a pretty decent Ha signiture in the galaxy, so I added a layer of that to bring out those regions. I think it helped give the galaxy some depth, so the galaxy's pitch angle becomes more apparent (at least to me). Tons of very faint distant galaxies in the background of this area of the sky.

L = 189 x 600 1x1
Ha = 26 x 1200 1x1 (mixed as 28% of the Red channel)
R,G,B = 45 x300 each

Original image = raw Ha stack
Image B =less dark level for brighter room
Image C=more dark level for darker room

Thanks,

John D

Comments

Revisions

  • NGC 7741 LHaRGB, 



    
        

            John D (jaddbd)
    Original
  • NGC 7741 LHaRGB, 



    
        

            John D (jaddbd)
    B
  • Final
    NGC 7741 LHaRGB, 



    
        

            John D (jaddbd)
    C

B

Description: for brighter room

Uploaded: ...

C

Description: for darker room

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC 7741 LHaRGB, 



    
        

            John D (jaddbd)

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