Image information: Stacked, dark-subtracted, registered combination of 15 x 10s images in I-, R- and V-band, plus 40 x 10s unfiltered images. Image taken 09/05/2006 23:02-23:28 UT.
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| Description: M13 is the brightest globular cluster in the northern
sky and makes an excellent target for anything from binoculars upwards. The
central condensation of this cluster is moderately diffuse, adding to its
appearance. In this colour image, the red giants stars can clearly be seen,
seperated from the rest of the cluster.
Image information: Stacked, dark-subtracted, registered combination of 15 x 10s images in I-, R- and V-band, plus 40 x 10s unfiltered images. Image taken 09/05/2006 23:02-23:28 UT. |
Physical information: Magnitude: 5.8, size: 23.2', aka.: NGC6205 or Hercules Cluster or Great Globular Cluster, classification V.