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Contains:  NGC 898, NGC 891
Getting plate-solving status, please wait...
C23 ; NGC 891, 


            Marcel  Porsiel
C23 ; NGC 891

Technical card

Resolution: 4227x2890

Dates:Sept. 2, 2019

Frames: 26x111" ISO3200

Integration: 0.8 hours

Darks: ~43

Flats: ~60

Bias: ~140

Avg. Moon age: 3.55 days

Avg. Moon phase: 13.61%

Bortle Dark-Sky Scale: 5.00

Temperature: 11.00 job: 2905008

RA center: 2h 22' 18"

DEC center: +42° 20' 31"

Pixel scale: 1.077 arcsec/pixel

Orientation: 44.417 degrees

Field radius: 0.766

Locations: Kleingartensternwarte-BS-OST, Braunschweig, Niedersachsen, Germany

Data source: Backyard


First Attempt on a galaxy after a few month of astro-break.
The wheater was partly cloudy so i could only get 48 minutes of quality light in one night.
But i will definitely collect a bit more light of that beauty as soon as possible!



Marcel Porsiel
License: Attribution-NonCommercial-ShareAlike Creative Commons


  • C23 ; NGC 891, 


            Marcel  Porsiel
  • Final
    C23 ; NGC 891, 


            Marcel  Porsiel


I was able to collect more light of C23! I decided to make shorter frames (55,5 seconds) to get more details out of the galaxy because my feeling was, that longer exposures make the picture a bit wishy-washy. Now the picture has 2hours and 50 minutes exposure time (17 x 111,1 seconds + 151 x 55,5seconds).

Sky plot

Sky plot


C23 ; NGC 891, 


            Marcel  Porsiel