Looking through the Dark Cloud B68

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 µm - 3 min; here colour-coded as "blue"), H- (1.65 µm - 30 min; "green") and Ks-filters (2.16 µm - 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.

Crédit:

ESO

À propos de l'image

Identification:eso9934a
Type:Observation
Date de publication:2 juillet 1999
Communiqués de presse en rapport:eso9934
Taille:3000 x 3008 px

À propos de l'objet

Nom:B 68, Barnard 68
Type:Milky Way : Nebula : Appearance : Dark : Molecular Cloud
Milky Way : Nebula : Appearance : Dark : Bok Globule
Distance:500 années lumière
Constellation:Ophiuchus
Catégorie:Nebulae

Image Formats

Grand JPEG
2,8 Mio
JPEG taille écran
525,9 Kio

Zoomable


Fonds d'écran

1024x768
501,4 Kio
1280x1024
740,4 Kio
1600x1200
951,8 Kio
1920x1200
1018,4 Kio
2048x1536
1,3 Mio

Coordinates

Position (RA):17 22 38.21
Position (Dec):-23° 49' 34.93"
Field of view:4.87 x 4.89 arcminutes
Orientation:North is 0.1° left of vertical

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Infrarouge
J
1.25 μmNew Technology Telescope
SOFI
Infrarouge
H
1.65 μmNew Technology Telescope
SOFI
Infrarouge
K
2.16 μmNew Technology Telescope
SOFI