Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  M101  ·  NGC 5451  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471  ·  NGC 5477  ·  NGC5447  ·  NGC5449  ·  NGC5450  ·  NGC5451  ·  NGC5453  ·  NGC5455  ·  NGC5461  ·  NGC5462  ·  NGC5471  ·  NGC5477  ·  Pinwheel galaxy
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first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti
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first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night

Getting plate-solving status, please wait...
first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti
Powered byPixInsight

first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night

Imaging telescopes or lenses: Orion USA 10" Astrograph F/3,9

Imaging cameras: QHYCCD 183m

Mounts: Ioptron Cem60

Software: Astroart

Filters: Baader Planetarium H-alpha 50nm narrowband filter

Accessory: Baader MPCC Mark III


Dates:Feb. 21, 2021

Frames:Baader Planetarium H-alpha 50nm narrowband filter: 440x60" (7h 20') (gain: 16.00) -20C bin 2x2

Integration: 7h 20'

Darks: ~363

Avg. Moon age: 8.93 days

Avg. Moon phase: 66.16%

Bortle Dark-Sky Scale: 8.00


Astrometry.net job: 4282202

RA center: 14h 3' 8"

DEC center: +54° 22' 37"

Pixel scale: 0.984 arcsec/pixel

Orientation: 149.867 degrees

Field radius: 0.419 degrees


Resolution: 2661x1517

Locations: Prato - S.Lucia Home Terrace Observatory, Prato, Prato, Italy

Data source: Backyard

Description

This is my first image of 2021 - 440 60 secs unguided subs on m101 - telescope was a Orion USA 250 F 3.9 - camera a QHY183m and mount an Ioptron CEM60EC - filter Baader 35nm ha.
The night was clear but very humid. In the morning the telescope was very, very wet.
Aquisition and processing with Astroart. A few cosmetics with PS. But image has almost unprocessed. Darks were not so correct, and I have used darks taken in June 2020.
A few words on my shelter:
https://astrob.in/m9i1hl/B/

The telescope and all the equipments, including CCD, have been outside inside my tent since september 2020. In these months we have had heavy rain, wind, cold and also a bit of snow. Yesterday I started up everything, and a part a few troubles on the CCD peltier connection, everything worked perfectly. Highly raccomanded.

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy 21 million light-years (6.4 megaparsecs) away from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the Messier Catalogue as one of its final entries. (Wikipedia)

Comments

Revisions

  • first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti
    Original
  • first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti
    B
  • Final
    first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti
    C

B

Description: given little bit more light with curves

Uploaded: ...

C

Description: flat correction with Astroflat pro PS plugin

Uploaded: ...

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first image of 2021 - 7 hours and 20 minutes on m101 on a very humid night, 



    
        

            Stefano Ciapetti