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.

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ESO

Om bilden

ID:eso9934a
Typ:Observation
Publiceringsdatum:2 juli 1999
Relaterade pressmeddelanden:eso9934
Storlek:3000 x 3008 px

Om objektet

Namn:B 68, Barnard 68
Typ:Milky Way : Nebula : Appearance : Dark : Molecular Cloud
Milky Way : Nebula : Appearance : Dark : Bok Globule
Avstånd:500 ljusår
Constellation:Ophiuchus
Kategori:Nebulae

Bildformat

Originalstorlek
16,2 MB
Stor jpeg
2,8 MB
Skärmstor jpeg
525,9 kB

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Skrivbordsunderlägg

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

Koordinater

Position (RA):17 22 38.21
Position (Dec):-23° 49' 34.93"
Field of view:4.87 x 4.89 arcminutes
Orientering:Nord är 0.1° vänster om lodrätt

Färger och filter

BandVåglängdTeleskop
Infrarött
J
1.25 μmNew Technology Telescope
SOFI
Infrarött
H
1.65 μmNew Technology Telescope
SOFI
Infrarött
K
2.16 μmNew Technology Telescope
SOFI