Seyfert's Sextet

Group of galaxies in the constellation Serpens

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	15^h 59^m 11.9^s^[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

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 (700 million light years behind the group) 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.

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

**Members of Seyfert's Sextet**
Name	Type	Distance from Sun (million ly)	Magnitude
NGC 6027	S0 pec.	~190	+14.7
NGC 6027a	Sa pec.	~190	+15.4
NGC 6027b	S0 pec.	~190	+15.4
NGC 6027c	SB(S)c	~190	+16
NGC 6027d	SB(S)bc pec.	~877^[4]	+15.6
NGC 6027e	SB0 pec.	~190	+16.5

References

^ ^a ^b ^c ^d "NASA/IPAC Extragalactic Database". Results for HCG 79. Retrieved 2006-10-29.
^ "HubbleSite - NewsCenter - Hubble Watches Galaxies Engage in Dance of Destruction (12/12/2002) - Release Images". hubblesite.org. Archived from the original on 2007-01-10.
^ C. K. Seyfert (1951). "A Dense Group of Galaxies in Serpens". Publications of the Astronomical Society of the Pacific. 371 (371): 72–75. Bibcode:1951PASP...63...72S. doi:10.1086/126319.
^ "NASA/IPAC Extragalactic Database". Results for NGC 6027d. Retrieved 2013-04-02.

External links

ASAHI Net Free Address Service: Seyfert's Sextet (Galaxy Group in Serpens) Archived 2009-03-05 at the Wayback Machine
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

Constellation of Serpens

Stars

Bayer	α (Unukalhai) β (Chow) γ δ ε ζ η θ (Alya) ι κ (Gudja) λ μ ν ξ ο π ρ σ τ¹ τ² τ³ τ⁴ τ⁵ τ⁶ τ⁷ τ⁸ υ φ χ ψ ω
Flamsteed	3 4 5 6 7 8 10 11 (A¹) 14 16 25 (A²) 29 36 (b) 39 40 43 45 46 47 59 (d) 60 (c) 61 64 3 Her 47 Oph
Variable	R W X RT UZ VV VY WX AA AN AO AP AR AU BQ CT CV CW EG FH FI FK FL FQ FR LV LW LX MR MS MT MV MY NN NO NQ NW OO OU PS QV QX QY V382 V411
HR	5665 5690 5692 5706 5711 5740 5745 5783 5796 5831 5850 5859 5861 5874 5909 5913 5931 5992 6005 6011 6014 6016 6449 6496 6544 6562 6568 6600 6620 6666 6681 6755 6756 6757 6785 6830 6840 6843 6858 6890 6898 6928 6993 (e) 6999 7008 7048 7076 7144
HD	135061 135615 136027 136118 138085 142245 143436 145936 146740 157969 168112 168443 168746 (Alasia) 175541 (Kaveh)
Other	ADS 9544 AS 296 9 11 22 23 27 Gliese 701 Gliese 710 GJ 1224 GX 17+2 IRAS 18418-0440 MWC 297 MWC 922 PG 1510+234 PG 1605+072 PSR B1534+11 PSR J1719−1438 Ross 508 Serpens FIRS 1 Serpens SVS 20 Serpens X-1 W40 IRS 1A South

Exoplanets	CoRoT-9b CoRoT-11b CoRoT-22b CoRoT-23b CoRoT-27b HD 168746 b (Onasilos) HD 175541 b (Kavian) ω Serpentis b

Star
clusters

NGC	NGC 6535 NGC 6539 NGC 6604 NGC 6605
Other	IC 4756 Messier 5 Messier 16 Serpens OB2 Serpens South Palomar 5

Nebulae

Other	Abell 41 Eagle Nebula L134 L183 L483 Serpens cloud Sh2-54 Westerhout 40 Red Square Nebula S68

Galaxies

NGC	5887 5910 5911 5913 5919 5920 5921 5926 5928 5931 5936 5937 5940 5942 5941 5944 5951 5953 5954 5952 5956 5955 5957 5960 5962 5964 5970 5972 5975 5977 5980 5983 5984 5988 5991 5990 5994 5996 5997 6003 6004 6008 6006 6007 6009 6012 6010 6014 6020 6017 6018 6021 6022 6023 6027 6027a 6027b 6027c 6027d 6027e 6029 6033 6037 6036 6051 6063 6065 6066 6070 6080 6100 6118 6172
Other	317 318 321 323.1 324 326 Arp 72 Arp 220 4C 11.50 CGCG 049-033 Hoag's Object IC 4537 IRAS 15107+0724 NRAO 530 PDS 456 PG 1553+113 PGC 54493 PKS 1546+027

NGC