| Designation |
Messier 13 (NGC6205) The Great
Hercules Cluster
|
| Type | Globular Cluster |
| Constellation | Hercules |
| Coordinates | Telescope centered at RA '16 41 07' - Dec '+ 36 28 09' |
| Magnitude | 5.7 |
| Size | 140 light years |
| Distance | 21,000 light years |
| Dimensions | 16.6 arcminutes |
| Image Field | 15 x 19 arcminutes |
|
Notes:
|
M13 was was discovered by Edmond Halley the famous comet hunter in 1714. It is the largest and brightest globular cluster (generally) visible from the Northern Hemisphere. It's brightness is due both to its relative nearness and its intrinsic brightness. |
| M13 has an absolute magnitude of -8.7, which equates to about 240,000 suns. The stars in M13 are also in close proximity to each other with a density of several stars per cubic light year. | |
|
|
| Telescopes | Intes Micro Alter M 806 203mm f/6 Mak Cass on Losmandy G-11 with Gemini L4 |
| Focal Length | 1218 mm |
| Guiding | SXV guidehead through Takahashi FS60C @ f/5.9 |
| Telescope Control | Maxim DL (V4.5) |
| CCD Camera |
Starlight Xpress SXV-H9 - USB 2 ExView progressive
scan
1392 x 1040 (6.45 uM) pixel array (8.98 x 6.71 active area)
|
| Image Scale | 1.18 arcsec/pixel |
| Filters |
1.25" Astronomik Type II Dichroic
IR blocking filters in True Tech filter wheel- Red, Green, Blue
|
| Exposures |
36 minutes
total: RGB 12 minutes each (6 x 2) unbinned
Left shot RGB 10
minutes each (10 x 1) unbinned
Sigma combined in Maxim DL
|
| Calibration | None |
| Processing Software | Maxim DL, Photoshop CS (8.0) |
| Location | Chiefland Astronomy Village, FL - 29.393 N , - 82.863 W |
| Date Imaged | 04/29/06 & 06/03/06 |
