Zwicky's Triplet

Zwicky's Triplet
Observation data (Epoch )
Constellation(s)	Hercules
Right ascension	16^h 49^m 28.3^s[1]
Declination	+45° 27′ 40″[1]
Brightest member	NGC 6241[2]

Zwicky's Triplet (Arp 103^[3]) is a group of three galaxies visible in the constellation Hercules.^[4][5]

The other Zwicky's Triplet

IC 3481 at 12h 32m, +11° 24' (2000.0) in Virgo, which is connected to PGC 41646 ("IC 3481A") as the system Arp 175, but probably not connected to IC 3483, is sometimes called Zwicky's Triplet, but this name is more often applied to the system at 16h 49m, +45° 30' (2000.0) in Hercules.^[6][7]

See also

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

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. "Zwicky's Triplet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-08.
3. SKY CATALOGUE 2000.0, Volume 2: Double Stars, Variable Stars and Nonstellar Objects (edited by Alan Hirshfeld and Roger W. Sinnott, 1985), page l
4. Steinicke, Wolfgang; Jakiel, Richard (January 4, 2007). Galaxies and How to Observe Them. Springer Science & Business Media. p. 194. ISBN 978-1-84628-699-5.
5. Zombeck, Martin V. (November 9, 2006). Handbook of Space Astronomy and Astrophysics. Cambridge University Press. p. 125. ISBN 978-1-139-45950-1.
6. SKY CATALOGUE 2000.0, Volume 2: Double Stars, Variable Stars and Nonstellar Objects (edited by Alan Hirshfeld and Roger W. Sinnott, 1985), page 362
7. Courtney Seligman, IC 3481