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M5 (NGC 5904), In Serpens Caput
M5 is a very impressive globular cluster, competing well against its bigger brother, M13. M5 is estimated to be about 26,000 light years distant (according to Burnham) and measures 13-19 arc minutes in diameter, depending on the method of measurement. It is considered to be one of the most ancient globular clusters, as suggested by the relative absence of blue stars in the core of the image above.
| Date | 2002-04-21 |
| Scope |
Astro-Physics 130 EDF at f4.5 on A-P 1200GTO mount; unguided Meade 416XTE CCD camera with 616 color wheel controlled with MaxIm DL/CCD v3.05 |
| Exposures | L=18x60 sec, R=8x60 sec, G=8x60 sec, B=8x60 sec, all unbinned |
| Processing |
Calibrated and RGB assembled in MaxIm. Luminance enhanced with DDP in MaxIm. L and RGB combined in Photoshop and then separately stretched and unsharp masked or blurred. Finally flattened and converted to jpg. |