| 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:
http://www.aerith.net/ comet/ catalog/ 0041P/ 2017.html |
| Date : | 2017-03-22 |
| Time (UT) : | 20:07 to 20:33 |
| Mount : | Skywatcher Star Adventures |
| Lens/telescope : |
Sigma APO 150mm f/2.8 (f/4.0) |
| Field (FOV) : | 13.6x9.1 degree, before cropping |
| Filter : | none |
| Camera : |
Canon EOS 6D |
| 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 national park. Bortle class 4. To be in a big city this place is dark. |
| 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. |
|
| Comment : |
This is a crop around the comet. You can see the galaxy M108 just above and to the right is the planetary nebula M97,
also called the Owl Nebula. |
English
(click on the image to get a full resolution photo in a new window)