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Contains:  NGC 3077, M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
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Technical card

Resolution: 3251x2441

Dates:March 3, 2019

Frames:
Astrodon Tru-Balance LRGB E-Series Gen 2 Blue: 27x600" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Green: 27x600" bin 1x1
Astrodon Ha 5nm: 30x1200" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Luminance: 44x1200" bin 1x1
Astrodon Tru-Balance LRGB E-Series Gen 2 Red: 27x600" bin 1x1

Integration: 38.2 hours

Avg. Moon age: 26.71 days

Avg. Moon phase: 8.75%

Astrometry.net job: 2575029

RA center: 149.306 degrees

DEC center: 69.332 degrees

Pixel scale: 2.096 arcsec/pixel

Orientation: 270.192 degrees

Field radius: 1.184 degrees

Locations: E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Unknown

Description

Whilst we were working on our TEC 140 mosaic of M81 and M82, Barry and I also imaged the same area using our Takahashi 106 and QSI 683. We decided that in the wider view, we would aim to present the rich IFN. We wondered if 20 minute Luminance subs (as opposed to our usual 10 minute subs) might be more effective at bringing this to the fore.

The Integrated Flux Nebula is, of course, extremely faint and so a balance needs to be struck between making it visible, whilst trying to avoid an ‘unnatural’ degree of brightness relative to the galaxies.

Since we already had the high resolution TEC data (Messier 81, Messier 82, and associated objects in Ursa Major: Two Panel Mosaic – HaLRGB) it seemed sensible to incorporate this in an attempt to give finer detail to the galaxy cores. This gave rise to a rather absurd total integration time. The TEC data is already accounted for, so I only included the Takahashi data in the submission form.

Messier 81 and Messier 82 are around 12 million light years away in the constellation of Ursa Major.

Data for this image were collected between 31 December 2018 and 3 March 2019 from a remote imaging rig in Spain owned and operated by Barry Wilson and Steve Milne.

Capture details are as follows:

Telescope: Takahashi FSQ 106
Camera: QSI 683
Filters: Astrodon
Mount: 10 Micron GM1000HPS

Ha: 30x 1200s
Lum: 44 x 1200s
Red: 27 x 600s
Green: 27 x 600s
Blue: 27 x 600s

Telescope: TEC140
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM2000HPS

Ha: 48x 1200s
Lum: 96 x 600s
Red: 48 x 600s
Green: 48 x 600s
Blue: 48 x 600s

A total of 94 hours and 10 minutes exposure (but see above).

Data capture: Steve Milne & Barry Wilson
Image Processing: Steve Milne

Comments

Author

gnomus
Steve Milne
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Messier 81 & 82 - Widefield, 





    
        

            Steve Milne