NGC 1931 is a nebula located in Auriga constellation, with diameter 3’ and apparent magnitude 10.1.
It is sometimes referred to like an Orion Nebula in miniature as it shares with it some features.
Indeed, it is a mix between and emission nebula and a reflection nebula and contains inside also an open cluster, a small version of M42 Trapezium.
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 LRGB, Ha 5nm
Guiding system OAG Moravian M68 with guide camera Moravian G1-0301
Exposure details L 27x600" + 10x60", all bin2 -25C
R 12x600" bin2 -25C
G 12x600" bin2 -25C
B 12x600" bin2 -25C
Ha 21x600" bin2 -25C
Total integration 14h10'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, Topaz DenoiseAI, DxO Photolab 3
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 17/18/24 October 2020, 16 October/5 November 2021