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").

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Om bilden

ID:eso0425a
Typ:Observation
Publiceringsdatum:17 augusti 2004
Relaterade pressmeddelanden:eso0425
Storlek:3882 x 3873 px

Om objektet

Namn:NGC 6397
Typ:Milky Way : Star : Grouping : Cluster : Globular
Avstånd:7000 ljusår
Constellation:Ara
Kategori:Star Clusters

Bildformat

Originalstorlek
33,8 MB
Stor jpeg
7,4 MB
Skärmstor jpeg
643,3 kB

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Skrivbordsunderlägg

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

Koordinater

Position (RA):17 40 42.10
Position (Dec):-53° 40' 27.18"
Field of view:15.78 x 15.74 arcminutes
Orientering:Nord är 0.0° höger om lodrätt

Färger och filter

BandVåglängdTeleskop
Synligt ljus
B
451 nmMPG/ESO 2.2-metre telescope
WFI
Synligt ljus
V
539 nmMPG/ESO 2.2-metre telescope
WFI
Synligt ljus
I
783 nmMPG/ESO 2.2-metre telescope
WFI