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41P Tuttle-Giacobini-Kresak 2017

Object : Comet, 41P Tuttle-Giacobini-Kresak 2017
Coordinates/Direction : -
Object size : -
Object magnitude : -
More to know : You can read more about the comet on Seiichi Yoshida's homepage: comet/ catalog/ 0041P/ 2017.html

Comet's light curve:

Comet 41P Tuttle-Giacobini-Kresak, light curve 2017 Credit: software 'Comet for Windows' from Seiichi Yoshida

The magnitude of the comet around the days I photographed it.

41P Tuttle-Giacobini-Kresak (click on the image to get a full resolution photo in a new window)
Date : 2017-03-22
Time (UT) : 20:07 to 20:33
Mount : SkyWatcher Star Adventurer, light weight mount
Lens/telescope : Sigma APO 150 mm f/2.8 (set to f/4)
Corrector/Barlow : -
Field (FOV) : 13.6x9.1o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Camera focus by Canon Remote APP, camera exposure by intervallometer
Exp. time : 41x30 seconds at ISO12800, this was a mistake in the dark, it should have been 800 or 1600.
Image process tool : AstroImageJ with my own macros, Fitswork, IrfanView.
Processing : demosaic, align rgb, no dark or bias, use dithering instead, median stack.
Site : Sweden, Stockholm, Tyresta Nature reservation, Spirudden. Bortle 4
Comment : I love to shot with this Sigma 150mm lens, it gives a field of 9x13 degrees. And I can also use the full size off my full frame sensor which I can't with my telescope. With this lens and with my lightweight mount I can go to dark places. When I took this photo the comet was in the constellation Big Bear. You can see the galaxy M108 just above and to the right is the planetary nebula M97, also called the Owl Nebula.

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