M13 Globular Cluster (LRGB)
Messier 13 also known as the Great Globular Cluster of Hercules is probably the most prominent and well-known globular cluster in the northern celestial hemisphere. Located at a distance of about 25,000 light years, M13 contains up to 1 million stars in a tightly packed cluster. It is estimated that the density of stars at its center is about 500 times more dense than stars in the neighborhood of our Solar System. In the field of view of this image (upper-left of M13) is an 11th magnitude galaxy, NGC 6207, that lies some 30 million light years away. For more detailed information regarding this globular cluster, click on the link to Rob Gendler's website near the bottom of the page.
Image Details
| Target: | M13, NGC 6205 |
| Coordinates (Center - J2000): | RA 16h 41m 43s ; Dec +36d 27m 36s |
| Date: | 13 & 14 April 2007 |
| Constellation: | Hercules |
| Imaging Location: | Chiefland, Florida |
| Camera: | SBIG ST-8XME & CFW-10 Color Filter Wheel |
| Filters: | Astrodon Series E Tru-Balance LRGB |
| Telescope: | Takahashi TSA-102S 4" APO Triplet f/8 (FL = 814mm) |
| Mount: | Takahashi EM-200 Temma II GEM (12 VDC) |
| Image Scale: | 2.28 arcseconds per pixel |
| CCD Temperature: | -15 C |
| L:R:G:B Exposures: | 80:40:40:40 minutes (5 min. sub-exposures) |
| Mount Control Software: | The Sky 6.0.0.52 |
| Camera Control Software: | CCDSoft 5.00.182 |
| Focus Control Software: | FocusMax 3.3.15 |
| Executive Control Software: | CCD Commander 1.4.5 |
| Sub-frame Registration Software: | Registar |
| Calibration and Combining Software: | CCDStack |
| Final Processing Software: | Photoshop CS |
Additional Information
Description of M13 (By Rob Gendler): http://www.robgendlerastropics.com/M13text.html