The globular cluster NGC 6397

This ESA/NASA/ESA Hubble Space Telescope Wide Field Planetary Camera 2 image shows the globular cluster NGC 6397 in the constellation Ara (the Altar). It is composed of six exposures through different filters: violet/indigo (Strvmgren u, 345 nm, 15080 seconds), blue (B, 418 nm, 8580 seconds), dark green (V, 515 nm, 978 seconds), light green (H-alpha, 656 nm, 24180 seconds), red-orange (R, 678 nm, 1538 seconds), and red (I, 839 nm, 978 seconds). The cluster is home to a highly unusual system consisting of a fast spinning pulsar and a bloated red companion star.

Credit:

European Space Agency & Francesco Ferraro (Bologna Astronomical Observatory)

About the Image

Id:heic0201c
Type:Observation
Release date:13 February 2002, 15:00
Related releases:heic0201
Size:1416 x 1493 px

About the Object

Name:NGC 6397
Type:Milky Way : Star : Grouping : Cluster : Globular
Distance:7000 light years
Constellation:Ara
Category:Star Clusters

Image Formats

Large JPEG
904.1 KB
Screensize JPEG
476.7 KB

Wallpapers

1024x768
453.4 KB
1280x1024
656.1 KB
1600x1200
846.7 KB
1920x1200
712.2 KB
2048x1536
916.4 KB

Coordinates

Position (RA):17 40 44.94
Position (Dec):-53° 40' 19.45"
Field of view:2.35 x 2.48 arcminutes
Orientation:North is 138.0° left of vertical

Colours & filters

BandWavelengthTelescope
Ultraviolet
U
345 nm Hubble Space Telescope
WFPC2
Optical
B
418 nm Hubble Space Telescope
WFPC2
Optical
V
515 nm Hubble Space Telescope
WFPC2
Optical
H-alpha
656 nm Hubble Space Telescope
WFPC2
Optical
R
678 nm Hubble Space Telescope
WFPC2
Infrared
I
839 nm Hubble Space Telescope
WFPC2

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