BARNARD 235 - DARK NEBULA

SCORPIUS

 (ra: 16:47.24 / dec -44:31)

June 2010, Star Party in Huellas de la Naturaleza with Proxima Sur 70 km away from Buenos Aires.

Buenos Aires, Argentina

DATA

TYPE: Dark Nebula

APPARENT MAGNITUDE: n/s

SIZE: 7 x 3 arcs minutes

DISTANCE: not found

OBJECT DESCRIPTION AND IMAGE SESSION

Barnard 235 is one of the numerous dark nebulas in the Constellation of Scorpius near the limits with Ara. Edward Emerson Barnard was an North American astronomer who publish 370 objects under his catalogue. In this case this relative small nebula stands in contrast in front of a rather populated stellar background. Dark Nebulas are interstellar clouds that obscures from the objects it had behind.

A non popular object however the backgrounds stars were nicely resolved with the SCT 8 despite the night conditions. The home made heaters worked very good.

IMAGE INFORMATION

SCOPE: Celestron SCT 8" working at 6.3

SKY CONDITIONS: Regular to bad night. Lot of humidity and poor seeing

CAMERAS: QSI 583 WS -20Cº

FILTERS: Astronomik Type 2

EXPOSURES: LRGB (20,20,20,20) 120 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