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.

Kredit:

ESO

O snímku

Id:eso9934a
Typ:Pozorování
Datum zveřejnění:2. července 1999
Související články:eso9934
Velikost:3000 x 3008 px

O objektu

Jméno:B 68, Barnard 68
Typ:Milky Way : Nebula : Appearance : Dark : Molecular Cloud
Milky Way : Nebula : Appearance : Dark : Bok Globule
Vzdálenost:500 světelné roky
Constellation:Ophiuchus
Kategorie:Nebulae

Image Formats


Zvětšovatelný


Pozadí

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

Souřadnice

Position (RA):17 22 38.21
Position (Dec):-23° 49' 34.93"
Field of view:4.87 x 4.89 arcminutes
Orientace:Sever je 0.1° levá od svislé osy

Barvy & filtry

PásmoVlnová délkaDalekohled
Infračervený
J
1.25 μmNew Technology Telescope
SOFI
Infračervený
H
1.65 μmNew Technology Telescope
SOFI
Infračervený
K
2.16 μmNew Technology Telescope
SOFI