Distance and Group Membership
Dwingeloo 1 is a highly obscured galaxy, which makes distance determination a difficult problem. The initial estimate made soon after the discovery and based on the Tully–Fisher relation was about 3 Mpc. Later it was slightly increased to 3.5–4 Mpc.
In 1999 another estimate was published claiming the distance of more than 5 Mpc. It was based on the infrared Tully–Fisher relation. As of 2011 the most likely distance to Dwingeloo 1 is thought to be approximately 3 Mpc based on its likely membership in the IC 342/Maffei group.
Dwingeloo 1 has two smaller satellite galaxies. The first one known as Dwingeloo 2 is an irregular galaxy and the second MB 3 is likely a dwarf spheroidal galaxy. Dwingeloo 1 is a member of the IC 342/Maffei Group of galaxies.
Read more about this topic: Dwingeloo 1
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