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").
Źródło:ESO
O zdjęciu
Identyfikator: | eso0425a |
Typ: | Obserwacje |
Data publikacji: | 17 sierpnia 2004 |
Powiązane komunikaty: | eso0425 |
Rozmiar: | 3882 x 3873 px |
O obiekcie
Nazwa: | NGC 6397 |
Typ: | Milky Way : Star : Grouping : Cluster : Globular |
Odległość: | 7000 lat świetlnych |
Constellation: | Ara |
Kategoria: | Star Clusters |
Współrzędne
Pozycja (RA): | 17 40 42.10 |
Pozycja (Dec): | -53° 40' 27.18" |
Pole widzenia: | 15.78 x 15.74 arcminutes |
Orientacja: | North is 0.0° prawo of vertical |
Kolory i filtry
Pasmo | Długość fali | Teleskop |
---|---|---|
Optyczny B | 451 nm | MPG/ESO 2.2-metre telescope WFI |
Optyczny V | 539 nm | MPG/ESO 2.2-metre telescope WFI |
Optyczny I | 783 nm | MPG/ESO 2.2-metre telescope WFI |