| Designation |
Messier 4
(NGC6121) luster
|
| Type | Globular Cluster (Class IX) |
| Constellation | Scorpius |
| Coordinates | Telescope centered at RA '16 22 07' - Dec '- 26 32 06' |
| Magnitude | 5.8 |
| Size | |
| Distance | 6,500 light years |
| Dimensions | 26.3 arcminutes |
| Image Field | 18.7 x 29 arcminutes |
|
Notes:
|
M4 is possibly the nearest globular cluster to earth. It is fairly dim as far as glocular clusters go. It has an absolute magnitude of -6.8, which is equivalent to about 44,000 suns. |
|
|
| 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 |
24 minutes
total: RGB 8 minutes each (8 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 | 06/03/06 |
