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.

This image has been awarded by NASA as Astronomical Picture Of the Day (APOD) for the day 23 March 2023 -

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