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

Technical card

Imaging telescopes or lenses: Canon 400mm f5.6

Imaging cameras: Canon 7D mark II

Mounts: iOptron Skyguider Pro

Guiding telescopes or lenses: SVBONY SV165 30mm Mini Guide Scope

Guiding cameras: ZWO ASI120MM-Mini

Software: Gimp 2.10.18  ·  Darktable for Linux  ·  SiriL for Linux

Accessory: ZWO ASIAir Pro


Dates:May 11, 2021May 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.

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Canon 400mm, 7DII M106, 



    
        

            TStew