NGC 1634: Cluster with Nebula
NGC 1624 was discovered on 28 December 1790 by the German-British astronomer William Herschel with his self-made 18.7 "f / 12.8 reflector telescope in Slough, England. [196, 277]
This is a young star cluster, embedded in the H-II nebula Sh2-212, which surrounds the star cluster like a shell. The age is estimated to be around four million years. The cluster consists of several massive main sequence stars and a large number of pre-main sequence stars. The brightest star is NGC 1624-2 near the center of the cluster. This star is the source of strong X-rays and rotates with a very strong magnetic field. About a fifth of the pre-main sequence stars are surrounded by dust disks. The cluster lies in the direction of the galactic anti-center at a distance of 6.0 ± 0.6 kpc. 
|Right Ascension||04h 40m 36.4s|
|Declination||+50° 27' 42"|
|Visual magnitude||11.8 mag|
|Metric Distance||6.025 kpc|
|Dreyer Description||F, cL, iF, 6 or 7 st + neb|
|Identification, Remarks||OCL 403, LBN 722, Ced 37, S 212|
The star cluster with H-II nebula is located in the constellation Perseus. The best time to observe is September to February, when it is highest at night.
Description pending ...