Posted: November 10th, 2010
 Click here for a larger version
Here's a 2x2 mosaic wide field of the North Celestial Pole, featuring one of the best friends of astrophotographers in the
Northern Hemisphere: Polaris. In fact, for us nomadic imagers, Polaris
is not only our friend, but at the beginning of each session, we get
on our knees and what may seem as an imager doing polar alignment,
we're in fact PRAYING to the Northern Star that the session goes well!
The image also features a copious amount of galactic cirrus (some of
it displaying some very cool structures), one of the oldest known open
clusters (NGC 188, at the bottom-middle), and Delta Um (middle right, the second star in Ursa Minor's tail)
If you'd like to see where the North Celestial Pole actually is, you can see it here:

The data was captured over the course of two nights next to the DARC Observatory under 21.3 mag skies (that's at the
Zenith), average transparency and bad seeing, and the processing was roughly
75% PixInsight and 25% CS5. DARC is around 120 miles from my home, so
that makes this a 480 miles image ;-) Not a lot of data (1h lum and 18m each color filter per frame) as I started the project when the Moon was already getting bit and setting late.
The image is also a testimony of how nice the polar scope of the EM400
mount is, as that's the only method I used both nights to polar align
(no drift, etc) and as many of you know, imaging near the pole requires a
good polar alignment, but of course, this image is not near the pole
but on the pole itself! The forgiving resolution of the FSQ does help,
but still, not bad at all.
As a friend said, in this image "north is not up", "north is IN"! :-)
As always, I identify a number of "I shouldn't have done that" or "I
should have done this that other way" during the processing, but
overall, and considering how seldom this area has been photographed, I
think it does it justice somehow as a display of how the area looks
like, and I'm happy with the results.
Get a poster, t-shirt, mug, mousepad... with this image!
[ Hide image details]
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DATE November 10th, 2010
PHOTO Exposure: 2x2 mosaic. Each frame: L: 12 x 5', RGB: 6x3' each,
Total: 1.9 hours Focal: 385mm, f/3.6
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EQUIPMENT
Imaging Scope: Takahashi FSQ 106 EDX w/Reducer
Camera: SBIG STL11k
Guide Camera: StarShoot Autoguider Mount: Takahashi EM-400
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SITE & CONDITIONS DARC Observatory
Seeing: Poor
Transparency: Average
SOFTWARE
Processing: PixInsight & Photoshop
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:: 6 Comments
Comments
Louie Atalasidis (Contact, Page), November 23rd, 2010, 19:10
Hi Rogelio
The fluff of a galaxy! wonderful shot.
vivgogo (Contact, Page), December 11th, 2010, 0:42
Learn from you
Rajan Murkute (Contact, Page), December 24th, 2010, 13:12
Hi Rogelio,
This is one of the finest photographs of the region surrounding Polaris and the North Celestial Pole. Also I liked the technical details provided with the photographs. There is a lot to learn from shots like these for a novice astrophotographer like me. Keep up the good work.
Wilma Dyer (Contact, Page), December 24th, 2010, 14:35
A very nice job. And an area of the sky seldom paid attention to by astrographers.
Greg Parker (Contact, Page), March 15th, 2011, 10:10
Hi Rogelio,
Could you have a go at imaging CTB1 - a supernova remnant in Cassiopeia? I think your dark skies could give one of the best images available of this object.
Greg
Hi Greg,
I haven't gone for it yet, because I think this object really shines in narrowband, and that requires a lot of exposure time, but I might go for it when it's the right season again. Too low in the sky now.
Thanks for the suggestion!!
Rogelio
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