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Contains:  M 101, NGC 5457, NGC 5473, NGC 5474, NGC 5477
Getting plate-solving status, please wait...
M101 LRGB, 



    
        

            Pam Whitfield
M101 LRGB
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M101 LRGB

Technical card


Dates:April 6, 2018

Frames:
Optolong Blue 36mm: 8x300" -15C bin 2x2
Optolong Green 36mm: 8x300" -15C bin 2x2
Optolong Lum 36mm: 11x600" -15C bin 1x1
Optolong Red 36mm: 8x300" -15C bin 2x2

Integration: 3.8 hours

Darks: ~15

Flats: ~15

Bias: ~20

Avg. Moon age: 20.53 days

Avg. Moon phase: 66.89%

Temperature: 14.00


Basic astrometry details

Astrometry.net job: 2894282

RA center: 14h 3' 14"

DEC center: +54° 20' 9"

Pixel scale: 3.177 arcsec/pixel

Orientation: 89.075 degrees

Field radius: 0.903 degrees


Resolution: 1649x1211

Locations: Home (Terrace), Brugg, Aargau, Switzerland

Description

I couldn't let the clear night go to waste. Objects of the right scale in the optimal part of my visible sky are a little scarcer at the moment so went back to M101 as it reached meridan around 2.30am and I'm too lazy to bother with meridian flips when I can get away with it :-)

I initially stacked/combined/processed with AstroPixel Processor again but intend restacking with the new DSS to see how they compare.
I don't consider it a wasted evening at any rate :-)

Comments

Author

whitfieldp
Pam Whitfield
License: None (All rights reserved)
1711
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Revisions

  • M101 LRGB, 



    
        

            Pam Whitfield
    B
  • Final
    M101 LRGB, 



    
        

            Pam Whitfield
    C

B

Description: Reprocessed using APP star colour and background calibration

C

Description: Twiddling my thumbs with the summer months - looking through the old I thought this one looked a bit flat. A very quick tweak can fix that....

Sky plot

Sky plot

Histogram

M101 LRGB, 



    
        

            Pam Whitfield

In these public groups

QHY Users Group