Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 2841
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NGC 2841, 


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NGC 2841

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NGC 2841, 


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NGC 2841

Imaging telescopes or lenses: Planewave CDK24

Imaging cameras: FLI Proline 16803

Mounts: Planewave L600

Guiding cameras: Starlight Xpress Ultrastar

Focal reducers: None

Software: Planewave PWI3  ·  Planewave PWI4  ·  PixInsight 1.8  ·  Sequence Generator Pro  ·  Photoshop CS3  ·  PHD Guiding 2  ·  CCDWare CCD Inspector  ·  Maxim DL6

Filters: Astrodon 50mm B  ·  Astrodon 50mm R  ·  Astrodon 50mm L  ·  Astrodon 50 mm G

Accessory: FLI CFW-5-7  ·  Astrodon Monster MOAG  ·  Hedrick Focuser  ·  Planewave Delta-T  ·  Planewave EFA

Dates:Feb. 11, 2020Feb. 12, 2020Feb. 13, 2020Feb. 14, 2020

Astrodon 50 mm G: 12x900" (3h) -30C bin 1x1
Astrodon 50mm B: 12x900" (3h) -30C bin 1x1
Astrodon 50mm L: 38x900" (9h 30') -30C bin 1x1
Astrodon 50mm R: 12x900" (3h) -30C bin 1x1

Integration: 18h 30'

Darks: 20

Flats: 80

Flat darks: 80

Bias: 20

Avg. Moon age: 18.95 days

Avg. Moon phase: 80.35%

Mean SQM: 21.20

Mean FWHM: 1.80

RA center: 09h21m30s.953

DEC center: +50°5436.96

Pixel scale: 0.468 arcsec/pixel

Orientation: -178.291 degrees

Field radius: 0.309 degrees

More info:Open 

Resolution: 3556x3153

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard


Although NGC2841 has been imaged a few times, only a handfull seem to really capture its beauty, especially in Kent Wood's capture of the very faint extended arms.

NGC2841 by Kent Wood

NGC2841 by Adam Block

NGC2841 by Robert Gendler

During this time of the year, seeing is extremely good in Julian, CA. But with no marine layer covering the lower cities, 21.2 SQM is the darkest I'm seeing. Nevertheless, 9+ hours of Luminance in a 24" does appear to capture a few photons from 46 MLY. (-:

"NGC 2841 is an inclined, unbarred, spiral galaxy in the constellation Ursa Major that exhibits a prominent inner ring structure. Initially thought to be about 30 million light-years distant, a 2001 Hubble Space Telescope survey of the galaxy's Cepheid variables determined its distance to be approximately 46 million light-years."

***Version B re-captures color without moon.***



    NGC 2841, 


  • Final
    NGC 2841, 




Description: Re-captured 900s x 12 of each RGB under 21.4 sky during 2/16 and 2/17. Prior version captured color with moon up.

Uploaded: ...

Sky plot

Sky plot


NGC 2841, 



In these public groups

Unique or Unusal Deep Sky Targets