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 |
Fonds d'écran
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
Domaine | Longueur d'onde | Télescope |
---|---|---|
Visible B | 451 nm | MPG/ESO 2.2-metre telescope WFI |
Visible V | 539 nm | MPG/ESO 2.2-metre telescope WFI |
Visible I | 783 nm | MPG/ESO 2.2-metre telescope WFI |