M101 - The Pinwheel Galaxy (Finished) (Kurt Zeppetello)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5422 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · NGC 5473 · NGC 5474 · NGC 5477 · NGC 5484 · NGC 5485 · Pinwheel galaxy

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M101 - The Pinwheel Galaxy (Finished)

Link: http://astroquest1.blogspot.com/

Powered byPixInsight

M101 - The Pinwheel Galaxy (Finished)

Link: http://astroquest1.blogspot.com/

My image of M101 from a couple of weeks ago was not particularly good as it was more of a test using APT with plate solving. I added data from last year and I went out a second night to capture more data. This time I used my Atlas Pro Mount with APT and Plate Solving. I was very happy as everything worked like perfectly. This latest colorful image is much better than any other image of M101 I ever did previously and shows the benefit of longer exposure. I did have one issue with PHD2 with the Atlas Mount in that I had to use the ST-4 cable (phone cable) as I needed to update the Version-4 SynScan Hand Controller like I did with the Sirius Mount. I updated it the following evening as I did not want to use too much of the clear night doing updates. Fortunately, the ST-4 cable worked fine.

M101 is a large face-on spiral galaxy located 21 million light-years from us. It is has a diameter of 170,000 light-years and has around a trillion stars. It is asymmetrical due to the tidal forces from interactions with its companion galaxies. These gravitational interactions compress interstellar hydrogen gas, which then triggers strong star formation activity in M101's spiral arms that can be detected in ultraviolet images (source: Wikipedia).

I did not crop this much as I like the wide field with all the other galaxies located in the field. I especially NGC 5422 in the lower central area.

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Status	Advanced success
Started	...
Astrometry.net job	2104681
PixInsight job	0IIRW7W2HVCRC6X0Q3XTN6YXM1SKWUSE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	14h03m09s.41
RA (top/left)	13h54m29s.64
RA (top/right)	14h10m17s.51
RA (bottom/right)	14h12m05s.26
RA (bottom/left)	13h55m41s.00

Dec (center)	+54°20′37″.8
Dec (top/left)	+53°41′54″.9
Dec (top/right)	+53°22′50″.6
Dec (bottom/right)	+54°56′56″.9
Dec (bottom/left)	+55°16′47″.4

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M101 - The Pinwheel Galaxy (Finished)

M101 - The Pinwheel Galaxy (Finished)

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M101 - The Pinwheel Galaxy (Finished)

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