B72 - DARK NEBULA

Ophiuchus

(ra: 17,23.3 / dec -23º:37',59'')

Joint work performed by Ezequiel Bellocchio and Sergio Eguivar from BA Suburbs

DATA

TYPE: Dark Nebula I

VISUAL BRIGHTNESS: n/a

SIZE (apparent): 30 arcs minutes

DISTANCE: 652 light years

DATE: July the 9th 2008

OBJECT DESCRIPTION

Barnard 72 is also known as the Snake Nebula. It is composed by interstellar dust and dark material concentration. Only visible because is interposing the light coming from a dense stellar cloud in this fascinating star field region in the constellation of Ophiuchus. Edwing Emerson Barnard catalogued 182 dark nebulas and his list was published by year 1919. Most popular object is Barnard 33 also known as the horse head nebula.

IMAGE INFORMATION

SCOPE: 10 " MEADE LX 200 @ f6.3

SKY CONDITIONS: Hazy night

CAMERA: Starlight Xpress SXVF M25

FILTERS: none

EXPOSURES: RGB (50)  10 x  300 seconds subs

GUIDING: Takahashi Sky 90II. LodeStar camera

IMAGE ACQUISITION: Astro Art and CCD Control Interface 3.72

CALIBRATED: Maxim Flats only SD Mask. Richardson Lucy Deconvolution. Photoshop CS

FITS FILES

M25

http://www.baskies.com.ar/PHOTOS/b72 m25.fit

H9

http://www.baskies.com.ar/PHOTOS//b72H9.fit