Hercules Cluster

This article is about the cluster of galaxies Abell 2151. For the globular cluster of stars, see Messier 13.

Hercules Cluster
Observation data (Epoch J2000)
Constellation(s)	Hercules
Right ascension	16^h 05^m 15.0^s[1]
Declination	+17° 44′ 55″[1]
Brightest member	NGC 6041
Number of galaxies	300[2]
Richness class	2[3]
Bautz–Morgan classification	III[3]
Redshift	0.03660 (10 972 km/s)[1]
Distance	156 Mpc (509 Mly) h^−1 0.705 [1]
X-ray flux	(15.00 ± 12.5%)×10^−12 erg s^−1 cm^−2 (0.1—2.4 keV) [1]
Other designations
Abell 2151

The Hercules Cluster (Abell 2151) is a cluster of about 200 galaxies^[4] some 500 million light-years distant in the constellation Hercules. It is rich in spiral galaxies and shows many interacting galaxies.^[5] The cluster is part of the larger Hercules Supercluster, which is itself part of the much larger Great Wall super-structure.^[6]

The cluster's brightest member is the giant elliptical galaxy NGC 6041.^[7]

See also

• Abell catalogue
• List of Abell clusters
• X-ray Astronomy

External links

• NASA Astronomy Picture of the Day: The Hercules Cluster of Galaxies (July 19, 2007)
• NASA Astronomy Picture of the Day: The Hercules Cluster of Galaxies (July 16, 2009)
• Hercules Cluster — University of Alabama
• The Hercules Cluster on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

References

1. "NASA/IPAC Extragalactic Database". Results for Abell 2151. Retrieved 2007-07-19.
2. "National Optical Astronomy Observatory". Galaxies. Retrieved 2007-07-19.
3. Abell, George O.; Corwin, Harold G. Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series. 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved March 13, 2012.
4. "Two Micron All Sky Survey". 2MASS Galaxy Science & Analysis. Archived from the original on 2007-06-30. Retrieved 2007-08-03.
5. "University of Alabama Astronomy". Astronomical Image Galleries. Retrieved 2007-07-19.
6. "HerculesClustertext". www.robgendlerastropics.com. Retrieved 24 October 2019.
7. "NGC 6041". Retrieved 2018-01-23.