| Designation |
Messier 92
(NGC6341)
|
| Type | Globular Cluster |
| Constellation | Hercules |
| Coordinates | Telescope centered at RA '17 17 02' - Dec '+ 43 08 03' |
| Magnitude | 6.4 |
| Size | 80 light years |
| Distance | 25,000 light years |
| Dimensions | 11.2 arcminutes |
| Image Field | 15 x 19 arcminutes |
|
Notes:
|
M92 was was discovered by J.E. Bode in 1777 and added to Messier's list in 1781. It is a beautiful cluster in all size scopes, but suffers in comparison due to it's proximity to it's flashier neighbor M13. |
| It is more distant than M13 and also about 40% smaller in diameter. Nonetheless, its absolute magnitude is -8.1, which equates to a luminosity of aproximately 150,000 suns. It is believed to be exceptionally old, even for a globular cluster. Its stars are deficient in iron and other heavy elements, which suggests it formed early in our galaxy's evolution. | |
|
|
| 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
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 |
