NGC 2841

About image 

NGC 2841 is one of the largest and brightest galaxies in Ursa Major: its has angular size 8.1x3.5’ and magnitude 9.5., while its estimated distance is 47 million light years.

Its spiral-arm structure is marked by a number of shorter spiral arms fragments that can be seen on the image as flocculent nodules around the galaxy just a little brigter than the sky. 

Several others faint background galaxies are visible in the field.

Technical data
Optic         GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount       10Micron GM2000 HPSII
Camera        ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters        Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB  
Guiding system   ZWO OAG-L with guide camera ASI 174MM
Exposure details  L 47x300" bin3 -15C

             R 17x300" bin3 -15C
             G 15x300" bin3 -15C
          B 16x300" bin3 -15C
Total integration  7h55'
Acquisition      Voyager, PHD2
Processing      Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
SQM-L       21.2   
Location       Promiod (Aosta Valley, Italy), own remote observatory
Date           11/12 February 2023


© Roberto Marinoni 2019 - All rights reserved