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Comet Catalina C/2013 US10

Object :	Comet, Catalina C/2013 US10
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/ 2013US10/ 2013US10.html

Comet Catalina, 2016-01-18:

Date :	2016-01-18
Time (UT) :	22:43 to 23:07

Exp. time :	22x60 seconds, iso800, relative guided on a star
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

The night after I took the last photos of the comet. Very weak now, if I had been at a dark place I could got good quality photos even now. The temperature all these nights were from -5 to +6 degrees Celsius. Good for the camera, the noise get lower at low temperatures.

Comet Catalina, 2016-01-17:

Date :	2016-01-17
Time (UT) :	00:25 to 00:35

Exp. time :	9x60 seconds, iso800, relative guided on a star
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

Two days later after mid night it came openings in the clouds. I setup the equipment and hope I could some more photos. But the clouds come back and it was only 9 photos of bad quality I got.

Comet Catalina, 2016-01-15:

Date :	2016-01-15
Time (UT) :	00:11 to 00:57

Exp. time :	38x60 seconds, iso800, relative guided on a star
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

This night I could take one more set of photos, I increased the exposure time to 60 seconds.

Comet Catalina, 2016-01-14:

Date :	2016-01-14
Time (UT) :	23:05 to 23:49

Exp. time :	60x30 seconds, iso800, relative guided on a star
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

Over the Christmas it was bad weather and I had to wait to the next year in middle of January until I could take more photos. Now we are near the end of the maximum and the comet is getting weaker, still it's possible to see traces of the tail.

Comet Catalina, 2016-01-14 + 2016-01-15:

Date :	2016-01-14 + 2016-01-15
Time (UT) :	-

Exp. time :

60x30 + 38x60 seconds, iso800

Comment :

I added two set of images together to reduce the noise and then increase the contrast. The right going tail is the plasma tail and the down going is the dust tail. At this moment the comet pass by the star in the handle of Great bear.

Comet Catalina, 2015-12-14:

Date :	2015-12-14
Time (UT) :	03:47 to 04:24

Exp. time :	52x30 seconds, iso800, relative guided on a star
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

One week later we had a clear sky again. Now it's closer to the comets maximal brightness, still it's weaker. I don't remember what cause it, probably the atmosphere.

Comet Catalina, 2015-12-08:

Date :	2015-12-08
Time (UT) :	03:59 to 04:38

Exp. time :	48x30 seconds, iso800, relative guided on a star
Image process tool :	Fitswork, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing

Comment :

Comet discovered 2013. A test with off-axis indirect auto guiding on stars and still follow moving objects like comets. When this photo was taken the comet was only 10 degrees over the horizon, it will be better in the middle of January. But that doesn't help, its peak at 6 magnitude is now in December.

Comet Catalina, 2015-12-08:

Date :	2015-12-08
Time (UT) :	03:59 to 04:38
Image process tool :	Siril, Gimp, Irfanview
Processing :	align, resize, level, cal dark and gamma image processing
Comment :	Same photo but processed with more modern tools, push the contrast to the limit to make the tail more visible. The high contrast also make all defects visible, optics, dust blobs

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