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Globular cluster in Canes Venatici
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Click on image for a larger view
Globular cluster in Canes Venatici
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At a distance of about 33,900 light years, M3 is further away than the center of our Galaxy, the Milky Way, but still shines at magnitude 6.2, as its absolute magnitude is about -8.93, corresponding to a luminosity of about 300,000 times that of our sun.
Messier 3 is one of the most outstanding globular clusters, containing an estimated half million stars. It is famous for the large number of variable stars discovered in it.
Discovered in 1764 by Charles Messier, M3 was first resolved into stars and recognized as cluster by William Herschel around 1784. More informations are available at the seds.org website |
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| Optics |
130 mm f/6.4 Astro-Physics EDF Refractor |
| Mount |
Astro-Physics AP 900GTO. |
| Camera | SBIG ST-10XE. |
| Filters | SBIG CFW8A.With Astrodon LRGB Ha filters |
| Focuser | Robofocus focuser and Focusmax software |
| Dates | April 2006. |
| Location | Lentin Observatory |
| Exposure | LRGB = L:20mn;R:20,G:20,B:20 minutes.bin1. Scale 1.69^s/pixel |
| Acquisition | Image data acquired remotely using ACP4 Observatory control software., MaxIm DL 4 |
| Processing | MaxIm DL 4, Photoshop CS2, Registar, |
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Antoine Vergara