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Ngc 3521 is a Spiral type galaxy which has an unusually large halo surrounding the outer arms. It is 39 million light years distant from the Earth and is receding at a rate of  5300 km/second.

120 minutes Luminance 1x1 binning.

40 minutes each of Red, Green and Blue 2x2 binning.

Five minute sub-frames.

05/03/11

Image acquired using SBIG St-10XME camera with Astrodon filter set through 10” Astro–Tech AT10RC Ritchey-Chretien telescope.