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M2 globular cluster
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M2
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M2 globular cluster
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Discovered by Jean-Dominique Maraldi in 1746. M2 has a diameter of about 175 light-years, contains about 150,000 stars, and is one of the richer and more compact globular clusters as its classification in density class II indicates. This cluster is of notable ellipticity (ellipticity 9, or form E1), it is extended in position angle 135 deg. At about 37,500 light years (according to W.E. Harris' database), it lies well beyond the Galactic Center. Visually it is of apparent magnitude 6.5 and about 6 to 8 minutes of arc in diameter, with a bright, compressed central region of about 5'. More informations are available at the seds.org website |
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| Optics |
130 mm f/6.8 Astro-Physics EDF Refractor with AP field flattener |
| Mount |
Astro-Physics AP 1200QMD + Astro-electronic FS2 goto |
| Camera | SBIG ST-10XE. |
| Filters | SBIG CFW8A.With Astrodon LRGB Ha filters |
| Focuser | Robofocus focuser and Focusmax software |
| Dates | August 30,2005. |
| Location | Lentin Observatory |
| Exposure | R,G,B = 45mn each color . bin1 -12°c. Scale= 1.58^s/pixel |
| Acquisition | MaxIm DL 4, TheSky 6, |
| Processing | MaxIm DL 4, Photoshop CS, Registar, Neat Image. |
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Antoine Vergara