Zwicky's Triplet Explained

Zwicky's Triplet
Constellation:	Hercules
Brightest Member:	NGC 6241
Names:	APG 103

Zwicky's Triplet (Arp 103^[1]) is a group of three galaxies visible in the constellation Hercules.

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.^{[2] [3]}

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

Notes and References

1. SKY CATALOGUE 2000.0, Volume 2: Double Stars, Variable Stars and Nonstellar Objects (edited by Alan Hirshfeld and Roger W. Sinnott, 1985), page l
2. SKY CATALOGUE 2000.0, Volume 2: Double Stars, Variable Stars and Nonstellar Objects (edited by Alan Hirshfeld and Roger W. Sinnott, 1985), page 362
3. https://cseligman.com/text/atlas/ic34a.htm#ic3481 Courtney Seligman, IC 3481