Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 106  ·  NGC 4217  ·  NGC 4220  ·  NGC 4258  ·  NGC 4346  ·  NGC 4357  ·  The star 3CVn
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Canon 400mm, 7DII M106, 



    
        

            TStew
Canon 400mm, 7DII M106
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Canon 400mm, 7DII M106

Getting plate-solving status, please wait...
Canon 400mm, 7DII M106, 



    
        

            TStew
Canon 400mm, 7DII M106
Powered byPixInsight

Canon 400mm, 7DII M106

Equipment

Imaging Telescopes Or Lenses
Canon 400mm f5.6
Imaging Cameras
Canon 7D mark II
Mounts
iOptron Skyguider Pro
Accessories
ZWO ASIAir Pro
Software
Darktable for Linux · Gimp 2.10.18 · SiriL for Linux
Guiding Telescopes Or Lenses
SVBONY SV165 30mm Mini Guide Scope
Guiding Cameras
ZWO ASI120MM-Mini

Acquisition details

Dates:
May 11, 2021 ·  May 12, 2021
Frames:
145x180" (7h 15') ISO1600
Integration:
7h 15'
Darks:
20
Flats:
30
Bias:
100
Avg. Moon age:
14.95 days
Avg. Moon phase:
0.26%
Bortle Dark-Sky Scale:
4.00
Temperature:
17.50

Basic astrometry details

Astrometry.net job: 4682366

RA center: 12h19m47s.0

DEC center: +47°3158

Pixel scale: 2.164 arcsec/pixel

Orientation: 270.341 degrees

Field radius: 1.805 degrees

Resolution: 5124x3133

Data source: Backyard

Description

M106 with a few companions with my dSLR+lens+SkyGuider tracker. First night with ASIair's multi-star guiding. While it is just a small tracker it still does pretty good with around .7"-1" total rms error with multistar guiding, just a slight improvement from averaging around .9"-1.2" before. I also dither as aggressive as it lets me. I must apologize my image is left with a bit of a donut pattern, seems my flats aren't properly calibrating things.

Comments

Revisions

  • Canon 400mm, 7DII M106, 



    
        

            TStew
    Original
  • Final
    Canon 400mm, 7DII M106, 



    
        

            TStew
    B

B

Description: I re-shot some flats after the fact, and did a reprocess. Results slightly better. I did not like the donut-shape vignette that was going on in the original. Its still there a little but overall much improved. Also adjusted colors ever so slightly. Usually I have not adjusted channels independently after photometric calibration, but the image had a bit of green tint and not quite the slightly purple often seen in the galaxy so I tried tweaking it a little.

Uploaded: ...

Sky plot

Sky plot

Histogram

Canon 400mm, 7DII M106, 



    
        

            TStew