Celestial hemisphere:  Northern  ·  Constellation: Virgo (Vir)
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Catalina Rising (C/2013 US10), 


            Tony Cook
Catalina Rising (C/2013 US10)
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Catalina Rising (C/2013 US10)

Acquisition details

Dec. 21, 2015
21×300(1h 45′) ISO800
1h 45′
Flat darks:
Avg. Moon age:
10.49 days
Avg. Moon phase:
Mean SQM:

Basic astrometry details

Astrometry.net job: 938332

RA center: 14h15m32s.6

DEC center: +03°4510

Pixel scale: 2.250 arcsec/pixel

Orientation: 89.674 degrees

Field radius: 1.611 degrees

Resolution: 620x413

File size: 102.1 KB

Locations: Dark Sky Site, Kirby Malzeard, North Yorkshire, United Kingdom


After a long period of back to back storms (Abigail, Barney, Clodagh and Desmond - Eva was on its way) a rare 2 hour clear sky window coincided exactly with the period before dawn and after the moon had set on the morning of 21st December 2015. This was my first attempt at Comet C/2013 US10 (Catalina). Imaging started as the comet slowly rose above the hazel bush next to my mount pier and ended when dawn was finally detectable in the images. The only downside was that the comet was traversing the worst part of my dark sky site in the light dome thrown up by the three cities of Ripon, York and Harrogate.

This image was acquired with no guiding and no dithering. The 10Micron mount controller compensated for refraction during the low altitude tracking using atmospheric pressure and temperature data.

Version B: Increased the comet layer screen blend coefficient from 1.00 to 1.33 to better emphasise the tails

Other images of C/2013 US10

29th December 2015

1st January 2016

9th January 2016

15th January 2016

31st January 2016

28th February 2016

30th March 2016

3D Stereo (relaxed eyes) 15th January 2016

3D Stereo (crossed eyes) 15th January 2016

Evolution sequence



  • Catalina Rising (C/2013 US10), 


            Tony Cook
  • Final
    Catalina Rising (C/2013 US10), 


            Tony Cook

Sky plot

Sky plot


Catalina Rising (C/2013 US10), 


            Tony Cook

In these public groups

Comets Imaging
Cloudy Nights