Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 2841  ·  NGC2841  ·  PGC2381679  ·  PGC2381753  ·  PGC2387030  ·  PGC2387317  ·  PGC26534  ·  PGC26549  ·  PGC26572
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NGC 2841 flocculent spiral and PGC 26572 SdBR galaxies, 



    
        

            rveregin
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NGC 2841 flocculent spiral and PGC 26572 SdBR galaxies

Getting plate-solving status, please wait...
NGC 2841 flocculent spiral and PGC 26572 SdBR galaxies, 



    
        

            rveregin
Powered byPixInsight

NGC 2841 flocculent spiral and PGC 26572 SdBR galaxies

Technical card

Imaging telescopes or lenses: Celestron 9.25 XLT Celestron С9.25

Imaging cameras: Canon 6D Full Spectrum Modified Canon 6D modified Full Spectrum

Mounts: CElestron CGX

Focal reducers: Celestron Reducer, f/6.3

Software: Starnet++  ·  Topaz Denoise AI  ·  SiliconFields / Ivo Jager Startools  ·  Deep Sky Stacker 4.2.1 64bit DSS DeepSkyStacker  ·  photoshop cc


Dates:March 4, 2021March 6, 2021March 7, 2021March 9, 2021March 14, 2021March 19, 2021March 20, 2021March 21, 2021

Frames:
895x8" ISO3200
5423x8"

Integration: 14.0 hours

Flats: ~100

Bias: ~60

Avg. Moon age: 14.07 days

Avg. Moon phase: 35.37%

Bortle Dark-Sky Scale: 7.00


Astrometry.net job: 4372185

RA center: 9h 22' 30"

DEC center: +50° 55' 1"

Pixel scale: 0.719 arcsec/pixel

Orientation: 179.724 degrees

Field radius: 0.329 degrees


Resolution: 2740x1827

Locations: My Driveway, Mississauga, Ontario, Canada

Data source: Backyard

Description

NGC 2841 is a beautiful spiral galaxy about 45 million light years away. It is not particularly active, though there are clearly visible the usual pink star forming regions. It is a beautiful example of a flocculent spiral, its many spiral arms broken up by dark dust clouds--to me to the point that they almost look like rings. Also, the far side, to the left, has much less obvious dust lanes than the near side on the right, since we view the far side through the galactic halo of stars, which reduces the dust lane visibility on that side.

The other reason I like this target is the wonderful small SdBR galaxy (an Sd barred galaxy with a ring), PGC 26572, to the upper right of the image. I like it so much I pushed NGC 2841 from taking a central dominant role, to bring back some emphasis to this small gem. (The PGC database is available online at HyperLeda, http://leda.univ-lyon1.fr/ ).

Estimates of the surface brightness of NGC 2841 led me to believe this would be a much easier target than it actually was. The central core is very bright indeed, but the spiral arms needed a lot more exposure, especially from my light-polluted-big-city skies. It could have used more exposure still, but there are too many beautiful targets for me to collect more, at least for now.

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