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.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso0510a
Tipo:Osservazione
Data di rilascio:22 Marzo 2005
Notizie relative:eso0510
Grandezza:1261 x 1261 px

Riguardo all'oggetto

Nome:Westerlund 1
Tipo:Local Universe : Star : Grouping : Cluster
Distanza:15000 Anni luce
Constellation:Ara
Categoria:Star Clusters
Stars

Formati delle immagini

JPEG grande
1,0 MB

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1,9 MB

Coordinate

Position (RA):16 47 4.02
Position (Dec):-45° 51' 4.39"
Field of view:5.00 x 5.00 arcminutes
Orientazione:Il Nord è a 0.1° a destra della verticale

Colori e filtri

BandaLunghezza d'ondaTelescopio
Ottico
V
550 nmMPG/ESO 2.2-metre telescope
WFI
Ottico
R
650 nmMPG/ESO 2.2-metre telescope
WFI
Infrarosso
I
784 nmMPG/ESO 2.2-metre telescope
WFI

 

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