Globular cluster NGC 6397

The globular cluster NGC 6397, located at a distance of approx. 7,200 light-years in the southern constellation Ara. It has undergone a "core collapse" and the central area is very dense. It contains about 400,000 stars and its age (based on evolutionary models) is 13,400 ± 800 million years. The photo is a composite of exposures in the B-, V- and I-bands obtained in the frame of the Pilot Stellar Survey with the Wide-Field-Imager (WFI) camera at the 2.2-m ESO/MPI telescope at the ESO La Silla Observatory. It was prepared and provided by the ESO Imaging Survey team. The spikes seen at some of the brighter stars are caused by the effect of overexposure (CCD "bleeding").

Crédit:

ESO

À propos de l'image

Identification:eso0425a
Type:Observation
Date de publication:17 août 2004
Communiqués de presse en rapport:eso0425
Taille:3882 x 3873 px

À propos de l'objet

Nom:NGC 6397
Type:Milky Way : Star : Grouping : Cluster : Globular
Distance:7000 années lumière
Constellation:Ara
Catégorie:Star Clusters

Formats des images

Grand JPEG
7,4 Mio
JPEG taille écran
643,3 Kio

Zoomable


Fonds d'écran

1024x768
561,4 Kio
1280x1024
848,9 Kio
1600x1200
1,1 Mio
1920x1200
1,3 Mio
2048x1536
1,7 Mio

Coordinates

Position (RA):17 40 42.10
Position (Dec):-53° 40' 27.18"
Field of view:15.78 x 15.74 arcminutes
Orientation:North is 0.0° right of vertical

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
B
451 nmMPG/ESO 2.2-metre telescope
WFI
Visible
V
539 nmMPG/ESO 2.2-metre telescope
WFI
Visible
I
783 nmMPG/ESO 2.2-metre telescope
WFI