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The planetary nebula M76 in Perseus constellations is also called “The little Dumbell” due to its resemblance with the Dumbell Nebula M27 in Cygnus Constellation.
M76 has an apparent diameter of 2.7’x1.8’ and magnitude 10.1, so it is one of the faintest object inside Messier catalogue.
Curiously it is identified with two NGC numbers (NGC 650 and 651), because at that time it was supposed to be a double nebula with the two components in contact.

Technical data
Optic          GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount        10Micron GM2000 HPSII
Camera         Moravian G3-16200 with external filter wheel 7 positions
Filters         Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted RGB , Astrodon 50mm narrowband filters Ha 5nm and OIII 5nm
Guiding system    OAG Moravian M68 with guide camera Moravian G1-0301
Exposure details  R 8x300" bin2 -20C
          G 8x300" bin2 -20C
          B 8x300" bin2 -20C

          Ha 20x900" bin2 -30C

               OIII 17x900" bin2 -30C
Total integration  11,2h
Acquisition      Voyager, PHD2
Processing      Pixinsight 1.8, Photoshop CS5, DxO Photolab 3
SQM-L       20.9    
Location       Promiod (Aosta Valley, Italy), own remote observatory
Date           10/25 October, 7 December 2019


© Roberto Marinoni 2019 - All rights reserved