M13
M13 is a giant globular cluster that consists of several hundred thousand stars. The cluster is about 150 light years in diameter. Like in all globular clusters, the stars are all old. Because the core of the cluster is very bright, many short exposures had to be taken so that it would not be over exposed.
| Observatory: | Kitt Peak National Observatory Kitt Peak, Arizona |
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| Telescope: | KPNO 4-Meter |
| Instrument: | Mosaic I |
| Astronomer: | T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF) |
| Date of Observation: | 04-16-2014 |
| Filters and Assigned Colors: | B (blue), V (green) and I (red) |
| Exposure Times: | 16x25sec in B, 13x25sec in V and 17x8sec in I |
| Location of Image: | Hercules |
| Field of View: | 21.4 x 21.4 arcmin |
| Orientation: | North is left, East is down |
| Link to Larger Image | |
| Link to Full Resolution Image | |
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