Simeis 57 Constellation: Cygnus
   
Telescope: Six-Inch Astrograph Date: July 25th, 26th and 27th
   
Subexposures: Ha 91x5minutes, OIII 44x5 minutes, RGB 10x1 minute Total Exposure Time: 11.5 Hours
   
Distance: 4,500 light-years 
   
 
 Semeis 57 Location (blue rectangle)