M 24 - PARTIAL VIEW- B92 & B93

STAR CLOUD IN SAGITTARIUS

 (Image Centered at ra: 18.17,25/ dec -18:27)

July  2009, Home Backyard in Martínez - Buenos Aires, Argentina

DATA

TYPE: Star Cloud associated with Dark Nebula and Open Clusters

Apparent Magnitude: 3.1

Apparent Diameter: 95 x 35 arc minutes

DISTANCE: 10.000 lights years

IMAGE INFORMATION

SCOPE: William Optics Zenithstar 66 at f6 (no WO 0.8 x fr/ff used)

CAMERA: SXVF H9

GUIDING: Celestron C8 SCT working at f8

IMAGE ACQUISITION: AstroArt 3.0 - Control Interface 3.72 plug in

FILTERS: Astronomik Type II - Astronomik Ha 6 nm - Atik Filter Wheel

SKY CONDITIONS: urban skies - transparency and seeing regular to bad

EXPOSURES: LRGB (30,15,15,15)

PROCESSING: Calibration in Images Plus, Photoshop CS2

OBJECT DESCRIPTION AND IMAGE SESSION

Messier 24 describe this object as a large nebulosity with many stars of different magnitudes. The cloud is visible to the naked eye un relative good skies. The picture is showing approximately 1 degree of the central region. There are also visible Dark Nebulas Barnard 92 and 93 this last one is the thinner. We can also see "partially" star cluster NGC 6603 (at the middle bottom) in Magnitude 11. Finally at the right of Barnard 92 there is a group of stars that forms star cluster Cr 469 of Magnitude 9.1

The sky condition was really bad. Thin clouds over the whole session which reflected the light of Buenos Aires making the transparency even worse. Nevertheless the small WO 66 resolved nice star patterns over this remarkable object.