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NGC 4939                           Image down-sampled 0.75x
Virgo
Penryn, California
May 2009
M 250 @ f 9.3 (ag, ST-4)
ST-10XME LRGB 10 minute subs

NGC 4393 is a Seyfert-2 galaxy classified as Sbc, surface brightness is listed as mag 14.1 and a red shift distance of 143 Mly.