SUNSET: 
0
Photographer:
massimo.difusco
Location of Photo:
Ferrara (Italy)
Date/Time of photo:
26/05/2024 03:00
Equipment:
Konus 200/1000 @950mm (f/4.8), Player One Poseidon-C camera @-5 °C, Sky-Watcher Eq6r Pro mount, Optolong L-QEF filter
Description:
NGC 188 (also known as Caldwell 1) is an open cluster in the constellation Cepheus about 5000 light-years away. It was discovered by John Herschel in 1831, who cataloged it with the number 34 (h 34). It is the northernmost open cluster there is: it is located less than 5 degrees from Polaris and is therefore circumpolar in almost the entire northern hemisphere. It is a very concentrated cluster, although its age has been estimated at 5 billion years, i.e., one billion less than the M67 cluster in Cancer and two less than NGC 6791 in Lyra, the oldest known cluster in the Milky Way. This contrasts with the characteristics of almost all known open clusters, generally made up of young, hot stars, which are still gravitationally bound to each other; in fact the main sequence stars of NGC 188
