The globular cluster Messier 13 in Hercules
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| Exposure date | 03.06.2010 and 05.06.2010 | ||
| Camera | Artemis 4021 | ||
| Instrument | 12,5" Newton RCNA |
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| Mount | Gemini 41 | ||
| Filters | Baader LRGB filterset | ||
| Exposure time | (L) 10 + 180 s (R,G,B)(5x5x5) * 300s 1 H 45min | ||
| Image orientation |
North is up, east is left |
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| Datareduction and image processing | THELI, PHOTOSHOP | ||
| Imaging conditions | Bad seeing conditions. |
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| Object data |
Size: 23.2'x 23.2' Brightness: 5.90 Surface brightness: 12.00 J2000 RA: 16h41m42.00s DE:+36°28'00.0" |
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| Distance to sun | around 22800 Ly | ||
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Description |
Messier 13 is located near by the second well known globular cluster Messier 92 in constellation hercules. In dark nights it is easy to observe with small aperture instruments and even with an binocular. The mass of the globular cluster is estimated with around 300.000 times the mass of our sun. The diameter of M13 is estimated by 150 Ly. |
