BARNARD 90 - DARK NEBULA

SAGITTARIUS

 (ra: 18.10,51/ dec -28:18)

June 2009, Home Backyard in Martínez, Buenos Aires, Argentina

DATA

TYPE: Dark Nebula in Starfield Background

Apparent Magnitude: n/a

Apparent Diameter: 10 arc minutes

DISTANCE: not found

IMAGE INFORMATION

SCOPE: Celestron C8 SCT working at f6 (roughly)

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, CLS - Atik Filter Wheel

SKY CONDITIONS: urban skies - transparency and seeing regular

EXPOSURES: LRGB (20,10,10,10)

PROCESSING: Images Plus Sigma Median Combine, CCD Sharp, Photoshop CS2

OBJECT DESCRIPTION AND IMAGE SESSION

A good object to image from urban skies. Barnard 90 is located 2 degrees above the "tea pot pipe". Not many images found of Barnard 90. It has an irregular elongated shape and in a relative small size. American Astronomer Edward Emerson Barnard (1857-1923) photographed and produced excellent images with a ten inches f5 telescope.

Dark Nebulae obscure light because they consist of micrometer size opaque particles. Many Dark Nebulae can be seen in dark skies along our Milky Way, where plenty of shining stars provide contrast in its background. (*)

(*) Source: Astronomy Magazine

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