SUNSET: 
0
Photographer:
massimo.difusco
Location of Photo:
Ferrara (Italy)
Date/Time of photo:
17/07/2024 00:00
Equipment:
Konus 200/1000 @950mm, Player One Poseidon-C camera @-5 °C, Sky-Watcher Eq6r Pro mount, Optolong L_Ultimate and L_Quad Enhance filters
Description:
Sh2-173 is an extremely faint emission nebula rich in ionized Hydrogen with a diameter of 77 light-years, lying 8800 light-years from Earth in the constellation Cassiopeia. It is part of the Perseus arm of our Milky Way Galaxy. Its shape and dark dust clouds bear a resemblance to the mask worn by the Phantom of the Opera in the Broadway musical or the film starring Lon Chaney. Hence it is commonly referred to as the Phantom of the Opera Nebula.
