B72 - DARK NEBULA

Ophiuchus

(ra: 17,23.3 / dec -23º:37',59'')

April 2011, Laguna de Todos los Santos, Buenos Aires, Argentina

Collaboration with Juan Jose Destefani (acquisition) and Sergio Eguivar (processing)

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: Orion ED 80  @ f7.5 with Sky Watche HEQ5

SKY CONDITIONS: Good  Transparency

CAMERA: Canon XSI unmodified

FILTERS: none

EXPOSURES: RGB 15 x  360 seconds subs

GUIDING: Orion Short Tube - Philips Toucam

CALIBRATED: Images Plus darks bias and flats used. Richardson Lucy Deconvolution. Photoshop CS