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Contains:  Part of the constellation Virgo (Vir), The star 95Vir, The star Syrma (ιVir), The star κVir, The star λVir
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C/2013 US10 Catalina, Venus and Moon, 


            Samuli Ikäheimo
C/2013 US10 Catalina, Venus and Moon
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C/2013 US10 Catalina, Venus and Moon

Technical card

Imaging telescope or lens:Canon 200 mm f/2.8 L II USM

Imaging camera:Canon 6D

Mount:iOptron SkyTracker

Software:Lightroom CC

Dates:Dec. 8, 2015

Frames: 1x15"

Integration: 0.0 hours

Avg. Moon age: 26.76 days

Avg. Moon phase: 8.44%

Basic astrometry details job: 876277

RA center: 14h 16' 37"

DEC center: -10° 17' 27"

Pixel scale: 12.178 arcsec/pixel

Orientation: 156.107 degrees

Field radius: 5.545 degrees

Resolution: 2048x2560


At last the weather was OK for seeing the C/2013 US10 Catalina. It's no Lovejoy nor Hale-Bopp, but quite nice little comet still.

Unfortunately my imaging session didn't go as smoothly as I'd liked. I think the previous time I did astrophotography with longer than 50mm lens must have been some time during the spring, so it wasn't too easy to shoot in windy sub-zero conditions, especially when the subject is just barely above the horizon! Lost quite a bit of data due to the 200mm lens being too warm and getting all kind of aberrations and misfocused shots.

But at least I got this single exposure which I'm happy with.

B version is a heavily stretched negative image to show the tail better.



Samuli Ikäheimo
License: None (All rights reserved)


  • Final
    C/2013 US10 Catalina, Venus and Moon, 


            Samuli Ikäheimo
  • C/2013 US10 Catalina, Venus and Moon, 


            Samuli Ikäheimo

Sky plot

Sky plot


C/2013 US10 Catalina, Venus and Moon, 


            Samuli Ikäheimo