Contains:M 1, Crab nebula, NGC 1952
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M1 - Test Shot, 




    

        JanD
M1 - Test Shot

M1 - Test Shot

Technical card

Imaging telescope or lens:Vixen R200SS

Imaging camera:Canon 600Da

Mount:Skywatcher HEQ5 Pro (belt mod.)

Guiding camera:ZWO ASI120MC

Focal reducer:Vixen Coma Corrector 3

Filter:Astronomik Clip CLS CCD

Resolution: 3148x2276

Dates: Feb. 8, 2018

Frames: 10x180"

Integration: 0.5 hours

Avg. Moon age: 22.90 days

Avg. Moon phase: 42.07%

Astrometry.net job: 1920712

RA center: 83.633 degrees

DEC center: 22.017 degrees

Pixel scale: 1.114 arcsec/pixel

Orientation: 334.790 degrees

Field radius: 0.601 degrees

Locations: Backyard, Aclens, Vaud, Switzerland

Data source: Unknown

Description

Back in Switzerland after the holidays at La Palma, I am suprised how much light pollution there is. I did not really notice that before, but now that I know how dark it can be...

A while ago I cleaned the mirror of my R200SS and readjusted everything. Tonight I wanted to see if I put everything together in the right manner. It turned out that I tightened the primary mirror to strong, so I got some severe pinching. The stars in one corner looked like little T's (see revision B). I will readjust everything this weekend.

I played around for quite a while and if I crop the test shots of M1 severely (around 50-60%), M1 itself does not look so bad. Nevertheless, another night where I learned a lot of new things (and almost froze my hands off ;)).

Best from Switzerland,
Jan

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Author

JanD
JanD
License: None (All rights reserved)
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Revisions

  • Final
    M1 - Test Shot, 




    

        JanD
    Original
  • M1 - Test Shot, 




    

        JanD
    B

B

The "bad" corner from the original full size image.

Sky plot

Sky plot

Histogram

M1 - Test Shot, 




    

        JanD