BOCHUM 14

 OPEN CLUSTER ASSOCIATED WITH NEBULOSITY IN SAGITTARIUS    

(Image centered at: ra 18 h:02 m / dec - 23º 41')

August 2023, Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Open Cluster

APPARENT DIAMETER:  5 to 6 arc minutes

APPARENT MAGNITUDE (V): 9.3

DISTANCE: 1900 light years

IMAGE INFORMATION

INSTRUMENT: 6" ORION OPTICS UK (Ultra Grade Optics) w/Sky Watcher Coma Corrector (0.9x) working at at f4.5

CAMERA: QHY 183 MONO

MOUNT: SKY WATCHER NEQ6, OAG with Starlight Xpress Lodestar

FILTERS: Optolong LRGB Set

SKY CONDITIONS: urban skies - Bortle 8

EXPOSURES: LHaRGB (60,60,60,60,60)

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OBJECT DESCRIPTION AND IMAGE SESSION

Just between Messier 8 and Messier 20 we found this small open cluster in the constellation of Sagittarius. I am calculating an apparent size between 5 to 6 arc minutes. Despite the picture from Austrian astro-photographer Wolfgang Promper, there are not much RGB images of this not so popular cluster. The nebulosity around the cluster is called BSF1 which I presume is associated. At the top o the image we have nebulosity coming from Messier 8 mostly.

There are  15 Bochum open clusters discovered during a UBV Hβ photometry survey of southern open star clusters carried out by A. F. J. Moffat & N. Vogt in 1975. They accomplish the observations through La Silla Bochum 0.61-metre telescope, hence the designation.