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)

Equipment

Imaging Telescopes Or Lenses
Takahashi FSQ-106 ED
Imaging Cameras
Starlight Xpress SX-814 Trius Monochrome CCD
Mounts
Sky-Watcher AZ-EQ6 GT
Filters
Red · Green · Blue · Ha 3nm
Accessories
Starlight-XPress Filter Wheel · Lakeside Astro Motor Focus System · Starlight Instruments FTF3545B-A Focuser
Software
Sequence Generator Pro · PIXINSIGHT 1.8
Guiding Telescopes Or Lenses
Opticstar AR80S (f5) Gold Guidescope
Guiding Cameras
Starlight-XPress Lodestar Autoguider

Acquisition details

Dates:
Feb. 6, 2015
Frames:
Blue: 44x180" (2h 12') -25°C bin 1x1
Green: 35x180" (1h 45') -25°C bin 1x1
Ha 3nm: 30x1390" (11h 35') -25°C bin 1x1
Red: 31x180" (1h 33') -25°C 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: 14h04m14s.2

DEC center: +54°3813

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

Sky plot

Sky plot

Histogram

M101 Widefield (HaRGB), 



    
        

            Mike Oates