This is Sharpless 119 (Sh2-119), a nice an often forgotten emission nebula sitting right next to the North America Nebula – somewhere in the Pacific Ocean. Probably, this is why are there not many images of it. In addition to the dominant H-alpha emission there are some prominent dark dust lanes. In the center of the nebulosity there is the star 68 Cyg.
This is a Ha plus OIII composite image constructed from 20 plus 12 exposures with 600 sec each, more than 5 hours of total exposure. The two hours of OIII data don not show much nebulosity, the little that is there was probably swallowed by background signal due to bad transparency. Taken with my wide-field setup with the Asahi/Pentax Takumar 135mm f/2.5 with the ATIK 460EXm from my balcony in the light-polluted Frankfurt area – Bortle class 7 (red zone). I will come back to this object at some point.
|Exposure:||HO, (20,12) x 600sec||Date:||2016-08-25…2016-09-08|
|Setup:||Takumar 135mm f/2.5 with ATIK 460EXm||Site:||Langen, Hessen, Germany|