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Contains:  M 101, NGC 5457, NGC 5473, NGC 5474, NGC 5485
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M101 - old RGB, new L, 


            Roberto Botero
M101 - old RGB, new L
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M101 - old RGB, new L

Technical card

Dates:Feb. 14, 2019Feb. 15, 2019Feb. 16, 2019Feb. 25, 2019

Frames:Hutech IDAS LPS P2 50mm square: 48x600" bin 1x1

Integration: 8.0 hours

Avg. Moon age: 12.83 days

Avg. Moon phase: 72.34%

Basic astrometry details job: 2562188

RA center: 14h 3' 11"

DEC center: +54° 21' 10"

Pixel scale: 1.430 arcsec/pixel

Orientation: 180.705 degrees

Field radius: 1.127 degrees

Resolution: 4015x4015

Locations: Home, Petts Wood, United Kingdom

Data source: Backyard


Acquired some new luminance data whilst learning to use Voyager - 8 hours of it - and used colour data from a shot I took in 2016: to create this composition.
There are plenty of stars that did not align properly towards the left of the frame, particularly top section as I was using a different flattener back in 2016.



Roberto Botero
License: None (All rights reserved)


  • M101 - old RGB, new L, 


            Roberto Botero
  • Final
    M101 - old RGB, new L, 


            Roberto Botero

Sky plot

Sky plot


M101 - old RGB, new L, 


            Roberto Botero