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.

Herkunftsnachweis:

ESO

Über das Bild

ID:eso9934a
Typ:Beobachtung
Veröffentlichungsdatum:2. Juli 1999
Dazugehörige Veröffentlichungen:eso9934
Größe:3000 x 3008 px

Über das Objekt

Name:B 68, Barnard 68
Typ:Milky Way : Nebula : Appearance : Dark : Molecular Cloud
Milky Way : Nebula : Appearance : Dark : Bok Globule
Entfernung:500 Lichtjahre
Constellation:Ophiuchus
Kategorie:Nebulae

Bildformate

Großes JPEG
2,8 MB

Skalierbar


Bildschirm-Hintergrundbilder

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

Koordinaten

Position (RA):17 22 38.21
Position (Dec):-23° 49' 34.93"
Field of view:4.87 x 4.89 arcminutes
Orientierung:Die Nordrichtung liegt 0.1° links zur Vertikale

Farben & Filter

SpektralbereichWellenlängeTeleskop
Infrarot
J
1.25 μmNew Technology Telescope
SOFI
Infrarot
H
1.65 μmNew Technology Telescope
SOFI
Infrarot
K
2.16 μmNew Technology Telescope
SOFI