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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, 2015-12-08:

Comet Catalina C/2013 US10
Date : 2015-12-08
Time (UT) : 03:59 to 04:38
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
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.

Comet Catalina, 2015-12-08:

Comet Catalina C/2013 US10
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

Comet Catalina, 2015-12-14:

Comet Catalina C/2013 US10
Date : 2015-12-14
Time (UT) : 03:47 to 04:24
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
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, 2016-01-14:

Comet Catalina C/2013 US10
Date : 2016-12-14
Time (UT) : 23:05 to 23:49
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
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 have passed the maximum and the comet is much weaker, still it's possible to see traces of the tail.

Comet Catalina, 2016-01-15:

Comet Catalina C/2013 US10
Date : 2016-01-15
Time (UT) : 00:11 to 00:57
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : This night I could take one more set of photos, I increased the exposure time to 60 seconds.

Comet Catalina, 2016-01-17:

Comet Catalina C/2013 US10
Date : 2016-01-17
Time (UT) : 00:25 to 00:35
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
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, 2016-01-18:

Comet Catalina C/2013 US10
Date : 2016-01-18
Time (UT) : 22:43 to 23:07
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 8 degree Celsius above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
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
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
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 was from -5 to +6 degrees Celsius. Good for the camera, the noise get lower at low temperatures.
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