SUNSET: 
0
Photographer:
Jim Case
Location of Photo:
Southern California
Date/Time of photo:
June-July 2023 & 2022
Equipment:
The image combines 11.33 hours of exposures with an 8” Meade LX200 ACF telescope, ANTILA ALP-T Dual Narrowband filter from July 2022 and June/July 2023, including 1.5 hours with an IR/Cut filter for the stars. Two different cooled cameras were used, the ASI2600MC in 2023 and the ASI294MC-PRO in 2022. Other equipment used included the ASAIR Plus, ASI174mm-mini for guiding with ASI OAG, CEM40 mount. Processed and combined using Astro Pixel Processor and Photoshop.
Description:
This is the Propeller Nebula (DWB 111 and 119 or Simeis 57) in Cygnus. This emissions nebula is part of the larger nebulosity in Cygnus. In a recent study it was suggested that it is excited by HD 193793, a supergiant and Wolf-Rayet binary star that is some distance from the nebula.
