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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Binocular comet Catalina - 8.12.2015 at 05.43 - 8.12.2015 at 06.20 Asikkala, Vesivehmaa Observation number 46060

Visibility II / V

Samuli Ikäheimo, Lahden Ursa

Picture 1: 05:43, Catalina, Venus and Crescent.

Second image: Same image with inverted and track comb treatment.

Triangle: At 6:20, Catalina's tails with a slightly tighter crop.

Four-image: The same image inverted and torn.

Vitos and weave image: Applying tail lengths with SkySafari 4 Pro.

At last, the weather allowed Catalina to wander, but after all the adjustment, I noticed that during the autumn there has been nothing more than a hilarious constellation. The report's current images camera to collect photons ..).

If a little imagination is used, the length of the upper tail can be estimated to be about 2½ degrees and the curved tail below to reach a distance of about two degrees. Although at this stage we still have to be quite skeptical about fantasies, stretching still images without flats is not the most scientific starting point. But let’s see if you could later get even a few pictures in a stack and some sort of confirmation for your imaginations.

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Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • C/2013 US10 (Catalina)
    • Heikosti näkyvä
  • Tail length
  • 2 degrees
  • Weather
    • Nollan tienoilla, lätäköt jäässä, muutamaa hattaraa lukuunottamatta pilvetöntä.
  • Visibility of the comet
    • Binocular comet
Technical information

Canon EOS 6D, EF 200 / 2.8L, 15s, f / 3.2, ISO1600. Sony a7S, 135 / 2.0, 15s, f / 2.0, ISO3200. Tracking: iOptron Skytracker. Image processing: Lightroom CC.

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