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Observation by Kevin Gurney: M101

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Kevin Gurney


Kevin Gurney


2021 Jul 18 - 23:00


2021 Aug 05 - 17:20



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Ursa Major

Field centre

RA: 14h03m
Dec: +54°22'
Position angle: -2°42'

Field size

0°28' × 0°22'

  • Altair Astro RC10 truss tube

L, 12x300s, , RGB, 7x300s each. All bin 1x1


Charente, France

Target name

M101 in LRGB



About this image

Having done battle with the pandemic travel requirements, we eventually made it to France where I could try out the new obsy. The Ritchey Chretien scope had been in storage and required some TLC to coax into action... Although I had takenĀ  'snaps' of M31 and M33 on a refractor last year to test things out, I considered this 'First Light' proper.

I was also using a CMOS camera (ASI1600) rather than the Atik460 for imaging for the first time. I wanted the best dynamic range so set the 'gain' to zero. Total integration tme was 2hr 45min

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