Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5473  ·  NGC 5477  ·  NGC 5485  ·  NGC 5486
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M101 Widefield (HaRGB), 



    
        

            Mike Oates
M101 Widefield (HaRGB)
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M101 Widefield (HaRGB)

Getting plate-solving status, please wait...
M101 Widefield (HaRGB), 



    
        

            Mike Oates
M101 Widefield (HaRGB)
Powered byPixInsight

M101 Widefield (HaRGB)

Technical card

Imaging telescopes or lenses: Takahashi FSQ-106 ED

Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD

Mounts: Sky-Watcher EZ-EQ6 GT

Guiding telescopes or lenses: Opticstar AR80S (f5) Gold Guidescope

Guiding cameras: Starlight-XPress Lodestar Autoguider

Software: Sequence Generator Pro  ·  PIXINSIGHT 1.8

Filters: Ha 3nm  ·  Red  ·  Green  ·  Blue

Accessory: Lakeside Astro Motor Focus System  ·  Starlight Instruments FTF3545B-A Focuser  ·  Starlight-XPress Filter Wheel


Dates:Feb. 6, 2015

Frames:
Blue: 44x180" (2h 12') -25C bin 1x1
Green: 35x180" (1h 45') -25C bin 1x1
Ha 3nm: 30x1390" (11h 35') -25C bin 1x1
Red: 31x180" (1h 33') -25C bin 1x1

Integration: 17h 5'

Flats: ~30

Bias: ~200

Avg. Moon age: 17.02 days

Avg. Moon phase: 94.35%

Temperature: -25.00


Basic astrometry details

Astrometry.net job: 544705

RA center: 14h 4' 14"

DEC center: +54° 38' 13"

Orientation: -179.999 degrees

Field radius: 0.840 degrees


Resolution: 4911x3954

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard

Description

Taken over 6 nights from 27 Dec 2014 to 6 Feb 2015. Made using Ha and separate R, G, & B filters.

NGC 5477 is a small galaxy to the left of M101, but if you look all over the image you will find many more galaxies especially in the top left. This image is the full size of the frame. I have also posted a closer crop of M101. All processing is done in PixInsight.

The Ha exposures were of different lengths, 600, 900, 1200 & 1800s.

I never thought I would be able to take RGB images from my home in light polluted Manchester UK. I believe this is only possible due to the Astrodon filters I use which has a slight gap between the green and red. The subs I have used here are just 180s but I know I can go up to about 8min which I will be doing from now on.

Note: I uploaded the wrong version, the second version has a slightly warmer hue.

Comments

Revisions

  • M101 Widefield (HaRGB), 



    
        

            Mike Oates
    Original
  • Final
    M101 Widefield (HaRGB), 



    
        

            Mike Oates
    B

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Sky plot

Histogram

M101 Widefield (HaRGB), 



    
        

            Mike Oates