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.

Credit:

ESO

About the Image

Id:eso0510a
Type:Observation
Release date:22 March 2005
Related releases:eso0510
Size:1261 x 1260 px

About the Object

Name:Westerlund 1
Type:• Local Universe : Star : Grouping : Cluster
• X - Stars
• X - Star Clusters
Distance:15000 light years
Constellation:Ara

Image Formats

Large JPEG
1.0 MB
Screensize JPEG
530.0 KB

Wallpapers

1024x768
564.2 KB
1280x1024
1.0 MB
1600x1200
1.4 MB
1920x1200
1.5 MB
2048x1536
1.9 MB

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

Colours & filters

BandWavelengthTelescope
Optical
V
550 nmMPG/ESO 2.2-metre telescope
WFI
Optical
R
650 nmMPG/ESO 2.2-metre telescope
WFI
Infrared
I
784 nmMPG/ESO 2.2-metre telescope
WFI

 

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