NGC 7814 & SN 2021 RHU - Little Sombrero and its Supernova

Image Description and Details : NGC 7814 is sometimes called the Little Sombrero for its resemblance to the brighter more famous M104, the Sombrero Galaxy. Both Sombrero and Little Sombrero are spiral galaxies seen edge-on, and both have extensive halos and central bulges cut by a thin disk with thinner dust lanes in silhouette. In fact, NGC 7814 is some 40 million light-years away and an estimated 60,000 light-years across. That actually makes the Little Sombrero about the same physical size as its better known namesake, appearing smaller and fainter only because it is farther away. In this view, NGC 7814 is hosting a newly discovered supernova, cataloged as SN 2021rhu, the stellar explosion has been identified as a Type Ia supernova, useful toward calibrating the distance scale of the universe.

Scope: Skywatcher 254/1000 reduced @960mm, f3.8
Camera: QHY8L @-10°C, gain 10, offset 113, with coma corrector Tecnosky 0.95x and Optolong L_pro filter
Guide: Skywatcher 70/500 with Asi120MM and UV/IR-cut filter Svbony
Mount: Skywatcher Eq6r Pro
Accessories: Zwo EAF
Management system: Raspberry PI4 with Stellarmate OS remotely controlled with Windows 10
Acquisition software: Kstars/Ekos
Frames: 144x300" calibrated with flat, dark and bias
Stacking and post-production softwares: AstroPixelProcessor, Pixinsight and Photoshop
Location: Ferrara (Italy), Bortle 6, SQM 19,22

Copyright: Massimo Di Fusco