The super star cluster Westerlund 1

Composite image of the super star cluster "Westerlund 1" from 2.2-m MPG/ESO Wide-Field Imager (WFI) observations. The image covers a 5 x 5 arcmin sky region and is based on observations made in the V-band (550 nm, 2 min exposure time, associated to the blue channel), R-band (650nm, 1 min, green channel) and I-band (784nm, 18 sec, red channel). Only the central CCD of WFI was used, as the entire cluster fits comfortably inside it. The foreground stars appear blue, while the hot massive members of the cluster look orange, and the cool massive ones come out red.

Crédit:

ESO

À propos de l'image

Identification:eso0510a
Type:Observation
Date de publication:22 mars 2005
Communiqués de presse en rapport:eso0510
Taille:1261 x 1261 px

À propos de l'objet

Nom:Westerlund 1
Type:Local Universe : Star : Grouping : Cluster
Distance:15000 années lumière
Constellation:Ara
Catégorie:Star Clusters
Stars

Image Formats

Grand JPEG
1,0 Mio
JPEG taille écran
530,1 Kio

Fonds d'écran

1024x768
564,3 Kio
1280x1024
1,0 Mio
1600x1200
1,4 Mio
1920x1200
1,5 Mio
2048x1536
1,9 Mio

Coordinates

Position (RA):16 47 4.02
Position (Dec):-45° 51' 4.39"
Field of view:5.00 x 5.00 arcminutes
Orientation:North is 0.1° right of vertical

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
V
550 nmMPG/ESO 2.2-metre telescope
WFI
Visible
R
650 nmMPG/ESO 2.2-metre telescope
WFI
Infrarouge
I
784 nmMPG/ESO 2.2-metre telescope
WFI

 

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