Dwingeloo 2 is a small irregular galaxy discovered in 1996 and located about 10 million light-years away from the Earth.
[2] 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.
[2] The visible radius of Dwingeloo 2 is approximately 2′, which at the distance of 3 Mpc corresponds to about 2 kpc.
[1] Dwingeloo 2 has a well defined rotating HI disk inclined at approximately 69° with respect to observer.
The distribution of the neutral hydrogen in Dwingeloo 2 is quite irregular, and it is detected as far as 3.2 kpc from the center of the galaxy.