Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  M101  ·  NGC 5422  ·  NGC 5457  ·  NGC 5473  ·  NGC 5474  ·  NGC 5485  ·  NGC5422  ·  NGC5447  ·  NGC5449  ·  NGC5450  ·  NGC5451  ·  NGC5453  ·  NGC5455  ·  NGC5461  ·  NGC5462  ·  NGC5471  ·  NGC5473  ·  NGC5474  ·  NGC5477  ·  NGC5484  ·  NGC5485  ·  NGC5486  ·  Pinwheel galaxy
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M101 - First time in Bortle 4, 



    
        

            Marc Mantha
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M101 - First time in Bortle 4

Getting plate-solving status, please wait...
M101 - First time in Bortle 4, 



    
        

            Marc Mantha
Powered byPixInsight

M101 - First time in Bortle 4

Imaging telescopes or lenses: William Optics Zenithstar 73

Imaging cameras: ZWO ASI294MC Pro

Mounts: SkyWatcher HEQ55 Pro GoTo

Guiding telescopes or lenses: William Optics Slide-base UniGuide 50mm Scope

Guiding cameras: ASI ZWO ASI120mm mini

Focal reducers: Willim Optics Flat 73

Software: Photoshop CC

Filters: Baader UV/IR Cut


Dates:June 5, 2021

Frames: 19x180" (57')

Integration: 57'

Avg. Moon age: 25.09 days

Avg. Moon phase: 20.68%


Astrometry.net job: 4598757

RA center: 14h 3' 14"

DEC center: +54° 24' 6"

Pixel scale: 2.157 arcsec/pixel

Orientation: 95.652 degrees

Field radius: 1.465 degrees


Resolution: 4049x2740

Data source: Traveller

Description

I finally did my first astro expedition. I met went to a dark location just 20 minutes from where I live (where I do my imaging) and the bortle scale drops from 8 to 4! I was also able to test my Jackery 240 and laptop autonomy and after about 3 hours of everything running, the battery was still at 65% capacity, so for the short summernights, this little battery does an excellent job. I was running everything with AC cables of course to optimize power consumption.

What a difference it makes from bortle 8 to 4! This is about 1 h of 3 minutes subs on M101, using only a UV/IR cut filter. For the first time, I did not have to run any gradient removal tool, just a simple background calibration in App. Honestly, I think that to get this amount of details from my front yard, I would need 5 hours of integration using a light pollution filter and a big job a gradient removal.

I'm definitely looking forward to going there again, once the nights become longer again, astro dark is now about 3 hours here.

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M101 - First time in Bortle 4, 



    
        

            Marc Mantha