SUNSET: 
0
Photographer:
massimo.difusco
Location of Photo:
Ferrara (Italy)
Date/Time of photo:
03/07/2024 00:00
Equipment:
Konus 200/1000 @950mm, Player One Poseidon-C camera @-5 °C, Sky-Watcher Eq6r Pro mount, Optolong L_Ultimate and L-QEF filters
Description:
Sh2-170, also known as Little Rosette Nebula, is an emission nebula visible in the constellation Cassiopeia which is located in the northwestern part of the constellation, about 5° north of the star Caph. It is an H II region located on the Perseus Arm about 7500 light years away, near the edge of a large superbubble originating from the combined action of the stellar wind of the Cassiopeia OB5 stellar association. The one responsible for the ionization of its gases is known by the acronym BD+63 2093; it is a main sequence star with spectral class O9V, part of the small and young open cluster Stock 18. The edges of the ionized region are mostly blurred, indicating a lower density at the periphery.
