Abell 1656 TEC 140

Abell 1656 Complete
Abell 1656

Abell 1656 – The Coma Cluster – is a cluster of galaxies in the constellation of Coma Berenices, located about 320-330 million lights years away.  The cluster is dominated by two supergiant elliptical galaxies  NGC 4874 and NGC 4889 which are visible in this image in the centre below the bright blue star (which is local to our own galaxy).  NGC 4889 is the largest and most massive galaxy in the local universe and is vsoble in modest amateur telescopes despite the great distance.  It contains the most massive black hole yet discovered.  The galaxy itself is estimated to have more than 1000 times the mass of opur own Milky Way galaxy.

Image Technical Data

Image acquired spring 2020 (during the Coronavirus lockdown) in my backyard in Nottingham, UK.  It was acquired with TEC 140 refractor (with field flattener) with Atik460 CCD camera and Astrodon LRGB Gen2 E series filters on my MESU 200 mount.  Guiding was via off-axis guider.

Luminance 30 x 300s 1×1;  Red 14 x 300s 2×2; Green 15 x 300s 2×2;  Blue 14 x 300s 2×2

Data processed with PixInsight and Photoshop and data collected with SGP Pro and guided with PHD2.


Annotated Version of Abell 1656

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