Hickson Compact Group
| Survey type |
astronomical catalog 
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galaxy
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| Named after | Paul Hickson
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A Hickson Compact Group (abbreviation: HCG) is a collection of galaxies designated as published by Paul Hickson in 1982.
The most famous group on Hickson’s list of 100 objects is HCG 92, Stephan's Quintet.
According to Hickson: “Most compact groups contain a high fraction of galaxies having morphological or kinematical peculiarities, nuclear radio and infrared emission, and starburst or active galactic nuclei (AGN) activity. They contain large quantities of diffuse gas and are dynamically dominated by dark matter. They most likely form as subsystems within looser associations and evolve by gravitational processes. Strong galaxy interactions result and merging is expected to lead to the ultimate demise of the group. Compact groups are surprisingly numerous, and may play a significant role in galaxy evolution.”
NGC 201 is a barred spiral galaxy similar to the Milky Way, a member of HCG 7
HCG 22 by Hubble Space Telescope
Hickson Compact Group 59 by Hubble Space Telescope
HCG 31 by Hubble Space Telescope
The four members of HCG 44 by Hunter Wilson
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