Dwingeloo 2

From Free net encyclopedia

{{Galaxy | name = Dwingeloo 2 | epoch = J2000.0 | type = IAm | ra = 02^h 54^m 08.47^{s^{| dec = +59° 00' 19.1"
| dist_ly = 10 million ly
| appmag_v = 20.5
| size_v ?
| constellation name = Cassiopeia
| radius_ly = ?
| absmag_v = ?
| notes = Maffei 1 group
companion galaxy
of Dwingeloo 1
| names = LEDA 101304
}}}}

Dwingeloo 2 is a small irregular galaxy. Dwingeloo 2 orbits Dwingeloo 1, much like NGC 5195 orbits the Whirlpool Galaxy (M51).

Dwingeloo 2 was first detected at radio wavelengths from the 21 cm emission line of neutral atomic hydrogen (known to astronomers as HI) in the course of follow-up observations after the discovery of Dwingeloo 1. Dwingeloo 1 and Dwingeloo 2 are thought to be members of the Maffei 1 group, a group of galaxies adjacent to the Local Group.