Object name: SH2
Designation(s): SH2, 175, LBN596,
SH2-175 aka LBN 596 is an emission nebula around LS I +64 26. Some sources say it is an O9.5 V star while others say it is a B1.5 V star. Not a big difference but still surprising. Less surprising is the uncertainty about the distance to this star and thus the nebula. I find estimates of 5100, 5550, and 6000 light-years by those saying it is a 09.5 V star. Russeil (yes, that is spelled correctly), who says it is really a B1.5 V star puts it at 3500 +/- 330 light-years. I assume the fact a B1.5 V star is a bit fainter than a 09.5 V star accounts for some if not most of the distance difference. All seem to agree that while it is seen in the area of the Cassiopeia OB1 complex it lies considerably closer to us and thus isn't part of the complex which is often said to be about 8200 light-years distant.
Related Designation(s):2MASX J04403475+5027419, 2MASX J23050983+6014560, 6C B043646.6+502153, 7C 0436+5022, 87GB 043647.6+502152, 87GB 230304.2+595825, 87GB[BWE91] 0436+5021, 87GB[BWE91] 2303+5958, IC 1470, NGC 1624, NVSS J044036+502744, NVSS J230510+601438, SHARPLESS 212, TXS 2303+599, [GMT2008] IR 23030, [KC97] G110.1+00.0, [KC97] G155.4+02.6, [WB92] 0436+5021, [WB92] 2303+5958, [ZHB90] G110.109+00.047,