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Contains:  Bode's Galaxy, Cigar Galaxy, M 81, M 82, NGC 3031, NGC 3034
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Bode's and Cigar

Technical card


Dates:Nov. 5, 2018Nov. 6, 2018Nov. 8, 2018Nov. 11, 2018Nov. 12, 2018Feb. 15, 2019Feb. 16, 2019Feb. 17, 2019Feb. 18, 2019Feb. 26, 2019Feb. 27, 2019Feb. 28, 2019Feb. 15, 2020March 17, 2020March 18, 2020

Frames:
ZWO B 1.25": 68x120" (gain: 76.00) -25C bin 1x1
ZWO G 1.25": 45x120" (gain: 76.00) -25C bin 1x1
Optolong Ha 7nm: 124x300" (gain: 139.00) -25C bin 1x1
Hutech IDAS 1.25" LPS P2: 66x300" (gain: 139.00) -15C bin 1x1
Hutech IDAS 1.25" LPS P2: 467x120" (gain: 76.00) -15C bin 1x1
ZWO L 1.25": 32x300" (gain: 139.00) -15C bin 1x1
ZWO R 1.25": 34x120" (gain: 76.00) -23C bin 1x1

Integration: 39.0 hours

Avg. Moon age: 16.66 days

Avg. Moon phase: 42.80%

Bortle Dark-Sky Scale: 6.60


Basic astrometry details

Astrometry.net job: 3333579

RA center: 9h 55' 47"

DEC center: +69° 19' 51"

Pixel scale: 1.101 arcsec/pixel

Orientation: 89.495 degrees

Field radius: 0.712 degrees


Resolution: 3880x2570

Data source: Mix of multiple source

Description

This is another 2 season shooting.

It began in the 2018-2019 season with shooting 2 panels with the 200p dobson ota put on the EQ6-R. I shot 8-9h of luminance on each panel from home, but the gradients due to light pollution killed any attempt of revealing the IFN. Nevertheless, I continued a few months later shooting some RGB and Ha data with the smaller 150PDS newton to have a coloured image.
Then, this season I had one night the AstroProfessional 102mm FPL51 equipped refractor with me and I put it to work. This time I was at a dark location and the IFN revealed easily. I was encouraged seeing the dust decently in less than 3h of exposure so 2 and 3 days (nights) ago I took out the scope again to a less dark location, but still decent skies at zenith and I shot about 5 more hours.

I combined all the refractor data which was intended to be used for the background and all the newtonian luminance for high resolution highlights.
I then combined these trying to mask and hide the big bloated stars from the less than perfect refractor. To these I added colour data from shot with the other newton.
The process was tedious so some artifacts are still visible. 8h of luminance with a 4" refractor is also not too much so the IFN is quite noisy.

Perhaps I won't be visiting these galaxies again until I switch to a larger photon hoover.

Comments

Author

alexbb
alexbb
License: None (All rights reserved)
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Bode's and Cigar, 



    
        

            alexbb