SHARPLESS 2-16 (AKA GUM 70) & COLLINDER 347

 EMISSION NEBULA AND OPEN CLUSTER IN SAGITTARIUS  

(Image centered at: ra 17 h:48 m / dec - 29º 18')

September 2022, Home Backyard in Martínez, Buenos Aires, Argentina

DATA

TYPE: Emission Nebula & Open Cluster

APPARENT DIAMETER: SHARPLESS 2-16 12 X 12 arc minutes; COLLINDER 347 4 arc minutes

APPARENT MAGNITUDE (V): SHARPLESS 2-16 NA; COLLINDER 347 8,8 (mag)

DISTANCE: not found 

IMAGE INFORMATION

INSTRUMENT: 8" ORION OPTICS UK (Ultra Grade Optics) w/Televue Paracorr working at at f5,75

CAMERA: QSI 583 WS

MOUNT: SKY WATCHER NEQ6, OAG with Starlight Xpress Lodestar

FILTERS: Baader LRGB Set; Astronomik Ha 6nm

SKY CONDITIONS: urban skies - Bortle 8

EXPOSURES: LHARGB (60,60,60,60,60)

OBJECT DESCRIPTION AND IMAGE SESSION

Sh 2-16 is part of the Sh 2-15 to Sh 2-20 complex of HII regions located in the Sgr OB5 association in the Sagittarius arm. It appears to be ionised by the O9.5 V star TYC 6840-271-1 (*)

Not much information found about these two objects. Sh 2-16 is also known as Gum 70. It call my attention de shape of the nebula surrounded 7,93 magnitude star TYC 6840-176-1

(*) Source - GalaxyMap.org