Object name: SH2
Designation(s): SH2, 115, BERKELEY90,
Sharpless 115 is a very large emission nebula in the constellation of Cygnus the Swan, about as far west of Deneb as the North American Nebula is east of it. It is thought to be about 7,500 light years distant and contain enough gas to make 4400 stars the size of our sun. It covers several times the area of sky that I can fit into my field of view. The nebula likely formed the star cluster Berkeley 90 toward the upper left of center in my image. The illuminating star, the one whose ultraviolet light causes the hydrogen gas to glow, is a member of the cluster and one of the brightest and most massive stars known. It is classed as 06. Find the cluster and note there are two brighter stars diagonally across opposite sides of the cluster from 7 O'clock to 1 O'clock. The one at 7 O'clock is the illuminating star. It is known as LS III +46 12. It appears dim compared to other stars in my image because most of its light is emitted as ultra violet light. That is mostly blocked by our atmosphere and what little does get through is blocked by my filters since it is outside the visual range of our eyes. The nebula itself is about 100 light years across. For a star to light up gas 50 light years from it is quite a feat and shows how bright it really is! But for that it will pay dearly. It will live only a couple million years before going supernova while our sun with less than 1/10th the mass will live over 10 billion years.
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,