Barnard 169-174 and the overlooked DA 568 and BFS 10

[gorann]

Finally a long clear night on Saturday, and I aimed my dual RASA 8 rig at this area of dark nebulosity just to the east of the Elephant Trunk Nebula. Collected about 9.5 hours with IDAS NBZ filter (so Ha and Oiii). I soon realized that there are other interesting objects here. Down to the right is a big round object of mainly Ha nebulosity and just above it there is a small but bright red object. After some search in the in the Simbad database I found that the larger area of Ha nebulosity is DA 568 and the smaller one is BFS 10 (aka WN B2154.8+5747). They were first found as strong radio emitting objects and not until 2004 described as Ha regions when a Kerton et al (2004) devoted a whole paper to these overlooked objects (https://iopscience.iop.org/article/10.1086/381296/pdf).

Cheers, Göran

This is what they look like as radio objects according to Kerton et al (2004). The big object seen to the right is the Elephant Trunk Nebula: