NGC 6559, IC 1274, Barnard 303 & Co

Sagittarius

 (ra: 18:10,0 / dec -24:06)

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June 2010, Collaboration with Ezequiel Bellocchio of AstroPilar and Sergio Eguivar from some place in the Golf field.

Buenos Aires, Argentina

DATA

TYPE: Emission, Reflexion and Dark Nebula Complex

MAGNITUDE: N/A

SIZE: Image 45x 30 arc minutes

DISTANCE: 5.800 light years

OBJECT DESCRIPTION AND IMAGE SESSION

NGC 6559 is surrounded by a complex and interesting region that includes a variety of objects. They are located at only one degree west from the Lagoon Nebula. The  bluish nebula next to the brilliant arc in the middle configure NGC 6559. Next to it, we can see the emission nebula (reddish) which contains young and hot stars. It is thought that the emission of radioactivity from those stars ionized the hydrogen protons producing a prominent brightness in the centre "arc shaped" cloud.

Barnard 303 is the "serpent shaped" dark nebula. It starts 3 arcs minutes from the brightest star in the photograph SAO 186366 with 7.6 magnitude. B 303 does not generate light, but absorbs the light of the hydrogen cloud which is more distant. This dark nebula spreads its path into 7 light years.

GN 18.06.6.01 is showed in the middle left. A small galactic nebula (GN) strongly embedded in red

IMAGE INFORMATION

SCOPE: Celestron SCT 8" working at 6.3

SKY CONDITIONS: Steady night with nearly half Moon

CAMERAS: QSI 583 WS -20Cº

FILTERS: Astronomik Type 2 + Ha 6 nm

EXPOSURES: LHaRGB (25,30,30,25,35) 300 subs

GUIDING: William Optics ZenithStar 66 f6. Starlight Xpress Lodestar Camera. AA 3.71 Control Camera Plug-in

PROCESSING: No darks, nor flats, nor offsets. Images Plus Sigma Median Combination, CCD Sharp Richardson Lucy Deconvolution Photoshop CS