| M21 Open Cluster | |
|---|---|
| R.A. | 18h 04 33.855s |
| Dec. | -22° 29' 30.78" |
| Apparent Size | 14'" |
| Mean Radial Velocity | -16.0 km/s |
| Magnitude | +5.90 , approx 70 stars |
| Distance | 1205 pc |
| Location | Sagittarius |
| Other IDs | NGC 6531 M21 |
| Scope | Intes Micro MN-56 with 0.5 Focal Reducer |
| Mount | EQ6 unguided |
| Exposure | 4 x 45 sec unguided |
| Post-processing | Stacked, d.framed,mild ddp in AA3. |
| Filters | IR |
| Camera | Starlight Express hx516 with ICX424AL chip |
| Location | Vendémain, France |
| Date | 25th August 2005 |
Very low on the horizon.