NGC 6188 COMPLEX – WIDE VIEW

Ara

(ra: 16h 41m 09s/ dec -48º 48' 00'')

September 2009, Mercedes Observatory Backyard- Buenos Aires, Argentina

DATA

TYPE: Bright Reflection Nebula and lot of stars !!

VISUAL BRIGHTNESS: NGC 6193: 5.2 (visual); NGC 6188 N/A

SIZE: NGC 6193 14 arcs seconds; NGC 6188 x 20 x 12 arc minutes

DISTANCE: 4000 light years

OBJECT DESCRIPTION AND IMAGE SESSION

NGC 6188 is one of the most beautiful emission nebula of the southern sky. The region gathers young blue stars, hot red gas and cool dark dust.  Is the home of a group of young stars which forms the open cluster NGC 6193. Its stars are so bright that reflects interstellar dust forming a diffuse blue glow which is nearly visible in the photograph.

The lens was quite sharp in all channels but the blue. Had to fight against aberrations in bright stars. The image is too under sampled nevertheless it was a interesting test for this little lens.

IMAGE INFORMATION

OPTICS: Pentax Tacumar 135mm f2.8 stop at f4

SKY CONDITIONS: rural skies - very good

CAMERA: Starlight Xpress SXVF H9

FILTERS: Astronomik Type II & Ha 6nm

EXPOSURES: LHaRGB (20,30,20,20,20) all 300 secs sub exposures

IMAGE ACQUISITION: AstroArt v 3. CCD control Interface v. 3.72

GUIDING: Orion ED 80 f 7.5  - SXV Guide Camera - Astro Art 3.0 CCD Control Interface Plug In

PROCESSED: Calibrated with Images Plus (no darks, nor bias used), Photoshop CS