Markarian's chain in Virgo

  Size: 2000 px      
© Velimir Popov & Emil Ivanov 2011 - 2017

Markarian's Chain is a a strip of galaxies in northern part of the constellation Virgo, that forms part of the Virgo cluster. It is called a "chain" due to the fact that, observed from Earth, the cluster arranges along a vaguely curved line. Its name refers to the Armenian astrophysicist Benjamin E. Markarian, who discovered their common motion in the early 1960s. The cluster includes, among the various galaxies, M84 (NGC 4374), M86 (NGC 4406), NGC 4477, NGC 4473, NGC 4461, NGC 4458, NGC 4438 and NGC 4435. A mouseover will show the catalog number of all NGC and IC galaxies, as well as the number of some brighter PGC galaxies. At least seven Markarian's Chain galaxies apparently move consistently, although others appear to superpose completely randomly.

Image details:


Center of field RA 12:27:44 (h:m:s)
Center of field DE +13:08:15 (deg:m:s)
Size 1.83 x 1.31 (deg)
Pixel scale: 2.03 (arcsec/pixel)
Orientation: Up is 255 degrees E of N
Charts and image details obtained from
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters
Dates/Times: 22-23.Marv. 2017
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:13x10min., R:9x10 min, G::9x10 min, B:9x10 min, Bin 1, Total Exposure Time - 400 min (6:40h).
More details: Dark and flat frames reduction,
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2017. All Rights Reserved
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