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NGC 2169 - THE "37" CLUSTER
ORION
(ra: 06.08,4/ dec +13:57)
January 2010, Home Backyard in Buenos Aires, Argentina
DATA
TYPE: Open Cluster
Apparent Magnitude: 5.9
Apparent Diameter: 7 arc minutes
DISTANCE: 3600 lights years
IMAGE INFORMATION
SCOPE: Celestron C8 SCT working at f5.1
CAMERA: SXVF H9
GUIDING: William Optics Zenithstar 66 with WO 0.8 x fr/ff
IMAGE ACQUISITION: AstroArt 3.0 - Control Interface 3.72 plug in
FILTERS: Astronomik Type II - Atik Filter Wheel
SKY CONDITIONS: urban skies - transparency bad - almost full Moon
EXPOSURES: LRGB (20,20,20,20) - Maximum subs posible: 2 minutes
PROCESSING: Images Plus, CCD Sharp, Photoshop CS2
OBJECT DESCRIPTION AND IMAGE SESSION
Always was intrigued about this funny open cluster. A good target to show visually to non astronomy related friends. It requires high magnification because is rather small. It spans over a distance of only 7 light years. It has approximately 30 stars and the brightest is magnitude 6.94.
With the Moon at full the longer exposure time goes to 2 minutes, before the image gets useless. Flash light was not necessary to handle the scope.