M106 Galaxy in HaLRGB from a White Zone (Douglas J Struble)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 106 · NGC 4248 · NGC 4258

M106 Galaxy in HaLRGB from a White Zone, Douglas J Struble

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M106 Galaxy in HaLRGB from a White Zone

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M106 Galaxy in HaLRGB from a White Zone

As most of the narrowband possibilities come to a close for the galaxy season here, I am forced to get back into broadband capturing in my White Zone (Bortle Sky Scale of 8). Every year I bang my head up against a wall; mostly with the RGB data. RGB data in a White Zone is always blotchy on the fainter structure. Anyways, this is about as best I could come up with at 54.3 hours of integration time.

Messier 106 (M106) is a spiral galaxy located in the constellation Canes Venatici, the Hunting Dogs. It lies at a distance of 23.7 million light years from Earth and has an apparent magnitude of 9.1. It has the designation NGC 4258 in the New General Catalogue. It occupies an area of 18.6 by 7.2 arc minutes of apparent sky, corresponding to a spatial diameter of 135,000 light years. It is classified as a SABbc type galaxy, which means that it is an intermediate between a normal and barred spiral galaxy. It is home to at least 400 billion stars. It's also classified as a Seyfert II galaxy. It has a considerably larger extent in radio than in visible light and exhibits emission line spectra from the nucleus. M106 shows unusual emission lines and X-rays, indicating that a portion of the galaxy is falling into a central supermassive black hole.

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Description: 2022 January's issue of Astronomy Magazine

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