Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
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Bode's and Cigar, 



    
        

            alexbb
Bode's and Cigar
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Bode's and Cigar

Getting plate-solving status, please wait...
Bode's and Cigar, 



    
        

            alexbb
Bode's and Cigar
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Bode's and Cigar

Technical card

Imaging telescopes or lenses: SkyWatcher 150/750 PDS  ·  SkyWatcher 200/1200 F6 Newtonian  ·  AstroProfessional 102ED

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Skywatcher AZ-EQ5  ·  SkyWatcher EQ6-R Pro

Guiding telescopes or lenses: SkyWatcher Finder/Guider 9x50  ·  SkyWatcher 150/750 PDS  ·  SkyWatcher 200/1200 F6 Newtonian

Guiding cameras: ZWO ASI120MM  ·  ZWO Optical ASI120MC

Focal reducers: SkyWatcher Coma Corrector (x0.9)  ·  OVL Field flattener

Software: PinInsight 1.8  ·  Stark Labs OpenPHD Guiding  ·  The Imaging Catalyst Astro Photography Tool  ·  GIMP 2.10  ·  Aries Productions Astro Pixel Precessor

Filters: ZWO B 1.25"  ·  ZWO G 1.25"  ·  ZWO R 1.25"  ·  Hutech IDAS 1.25" LPS P2  ·  Astronomik Ha 6nm

Accessory: ZWO Off-Axis Guider  ·  ZWO EFW 8x1,25"


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:
Hutech IDAS 1.25" LPS P2: 66x300" (5h 30') (gain: 139.00) -15C bin 1x1
Hutech IDAS 1.25" LPS P2: 467x120" (15h 34') (gain: 76.00) -15C bin 1x1
Optolong Ha 7nm: 124x300" (10h 20') (gain: 139.00) -25C bin 1x1
ZWO B 1.25": 68x120" (2h 16') (gain: 76.00) -25C bin 1x1
ZWO G 1.25": 45x120" (1h 30') (gain: 76.00) -25C bin 1x1
ZWO L 1.25": 32x300" (2h 40') (gain: 139.00) -15C bin 1x1
ZWO R 1.25": 34x120" (1h 8') (gain: 76.00) -23C bin 1x1

Integration: 38h 58'

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: 09h55m47s.8

DEC center: +69°1951

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

Revisions

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    Original
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    E
  • Final
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    F

Sky plot

Sky plot

Histogram

Bode's and Cigar, 



    
        

            alexbb