Seyfert's Sextet is a group of galaxies about 190 million light-years away[2] in the constellation Serpens. The group appears to contain six members, but one of the galaxies, NGC 6027d, is a background object and another "galaxy," NGC 6027e, is actually a part of the tail from galaxy NGC 6027. The gravitational interaction among these galaxies should continue for hundreds of millions of years. Ultimately, the galaxies will merge to form a single giant elliptical galaxy.

Seyfert's Sextet
A Hubble Space Telescope (HST) image of Seyfert's Sextet. Credit: HST/NASA/ESA.
Observation data (Epoch J2000)
Constellation(s)	Serpens
Right ascension	15h 59m 11.9s[1]
Declination	+20° 45′ 31″[1]
Brightest member	NGC 6027
Number of galaxies	4[1]
Other designations
Serpens Sextet, HCG 79, UGC 10116, VV 115, VII Zw 631[1]
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

Discovery

The group was discovered by Carl Keenan Seyfert using photographic plates made at the Barnard Observatory of Vanderbilt University. When these results were first published in 1951, this group was the most compact group ever identified.[3]

Members

See also

• Wild's Triplet
• Zwicky's Triplet
• Robert's Quartet
• Stephan's Quintet and NGC 7331 Group ( Also known as the Deer Lick Group, about half a degree northeast of Stephan's Quintet)
• Copeland Septet

References

External links

• ASAHI Net Free Address Service: Seyfert's Sextet (Galaxy Group in Serpens)
• NASA Astronomy Picture of the Day: Seyfert's Sextet (24 January 2003)
• SEDS: Seyfert's Sextet (HCG 79)
• Seyfert's Sextet on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

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