Looking through the Dark Cloud B68

Eso_eso9934a_500

eso_eso9934a July 2nd, 1999

Credit: ESO

B68 is a dark cloud situated at a distance of about 500 light-years (160 pc) towards the southern constellation Ophiuchus (The Serpent-holder). This is a false-colour, infrared composite photo of the dark cloud Barnard 68, obtained on March 8-9, 1999, with the SOFI instrument at the ESO 3.5-m New Technology Telescope (NTT) at La Silla. Three exposures were made through J- (wavelength 1.25 m - 3 min; here colour-coded as "blue"), H- (1.65 m - 30 min; "green") and Ks-filters (2.16 m - 30 min; "red"), respectively. The "reddening" of the background stars that are seen through the cloud is very obvious. It is due to the larger obscuration in shorter wavebands. The sky field measures about 4.9 x 4.9 arcmin 2 (1024x1024 pixels). A slight mismatch between the individual frames is present in the upper corners; this is caused by atmospheric effects. The pixel size is 0.29/arcsec. North is up and East is left.

Image Source: https://www.eso.org/public/images/eso9934a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
B 68 Barnard 68
Subject - Milky Way
Nebula » Appearance » Dark » Molecular Cloud
Nebula » Appearance » Dark » Bok Globule
Eso_eso9934a_128
 

Position Details

Position (ICRS)
RA = 17h 22m 38.2s
DEC = -23° 49’ 34.9”
Orientation
North is 0.1° CCW
Field of View
4.9 x 4.9 arcminutes
Constellation
Ophiuchus

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue New Technology Telescope (SOFI) Infrared (J) 1.3 µm
Arrow_left_green New Technology Telescope (SOFI) Infrared (H) 1.7 µm
Arrow_left_red New Technology Telescope (SOFI) Infrared (K) 2.2 µm
Spectrum_base
Arrow_top_blue
Arrow_top_green
Arrow_top_red
Eso_eso9934a_1280
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ID
eso9934a
Subject Category
B.4.2.3.1   B.4.2.3.2  
Subject Name
B 68, Barnard 68
Credits
ESO
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso9934a/
Type
Observation
Image Quality
Distance Notes
Facility
New Technology Telescope, New Technology Telescope, New Technology Telescope
Instrument
SOFI, SOFI, SOFI
Color Assignment
Blue, Green, Red
Band
Infrared, Infrared, Infrared
Bandpass
J, H, K
Central Wavelength
1250, 1650, 2160
Start Time
Integration Time
240, 1800, 1800
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
260.65922, -23.826369
Reference Dimension
3000.0, 3008.0
Reference Pixel
1660.54819411, 1716.1002713
Scale
-2.707656e-05, 2.707656e-05
Rotation
0.05350853229
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org/
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
European Southern Observatory
Publisher ID
eso
Resource ID
eso9934a
Metadata Date
2008-12-19T14:35:20+01:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

 

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There is no distance meta data in this image.