Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034  ·  The star 22UMa  ·  The star 24UMa
M81 and M82 with Integrated Flux Nebula IFN, 



    
        

            Ross Beckman
M81 and M82 with Integrated Flux Nebula IFN
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M81 and M82 with Integrated Flux Nebula IFN

M81 and M82 with Integrated Flux Nebula IFN, 



    
        

            Ross Beckman
M81 and M82 with Integrated Flux Nebula IFN
Powered byPixInsight

M81 and M82 with Integrated Flux Nebula IFN

Technical card

Imaging telescopes or lenses: William Optics SpaceCat 51

Imaging cameras: ZWO ASI 1600MM-Pro (Mono) ZWO ASI1600MM-PRO

Mounts: SkyWatcher EQ6R Pro  ·  Skywatcher Star Adventuer

Guiding cameras: QHY5L-II Mono QHY5L II Mono

Software: Sequence Generator Pro Seqence Generator Pro  ·  Pixinsight  ·  Photoshop CC 2016  ·  Phd2

Filters: Astrodon Luminance E-Series Gen 2  ·  Astrodon RED 36mm - Gen2 E-Series Tru-Balance  ·  Astrodon True Balance E series II Blue  ·  Astrodon True Balance E series II Green

Accessory: ZWO Off-Axis Guider  ·  QHYCCD QHY5L-II autoguider


Dates:Feb. 24, 2020April 15, 2020

Frames:
Astrodon Luminance E-Series Gen 2: 120x240" (8h) (gain: 75.00) -25C bin 1x1
Astrodon RED 36mm - Gen2 E-Series Tru-Balance: 24x300" (2h) (gain: 75.00) -25C bin 1x1
Astrodon True Balance E series II Blue: 24x300" (2h) (gain: 75.00) -25C bin 1x1
Astrodon True Balance E series II Green: 24x300" (2h) (gain: 75.00) -25C bin 1x1

Integration: 14h

Darks: 25

Flats: 25

Bias: 25

Avg. Moon age: 11.72 days

Avg. Moon phase: 22.64%

Bortle Dark-Sky Scale: 2.00


Basic astrometry details

Astrometry.net job: 3458115

RA center: 9h 44' 11"

DEC center: +69° 58' 55"

Pixel scale: 3.160 arcsec/pixel

Orientation: 327.429 degrees

Field radius: 2.522 degrees


Resolution: 4578x3472

Data source: Traveller

Description

LRGB image of the integrated flux nebula in Ursa Major including M81 and M82. The IFN exists outside the plane of the Milky Way and is illuminated by the integrated flux of the light from the galaxy as a whole rather than a single star or group of stars. Dark skies and long integration time is the key! This was shot over several nights in Sequoia National Park in February and the Eastern Shore of Maryland in April. The wide field and sharp optics of the WO Spacecat performed really nicely for this one.

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M81 and M82 with Integrated Flux Nebula IFN, 



    
        

            Ross Beckman