NGC 6811 - Hole in a Cluster
NGC 6811 - Hole in a Cluster |
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Object data of NGC6811 |
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| Object type: | open cluster (IV3p) | |
| Size: | 13' | |
| Magnitude: | 6.8 mag (brightest star: 11mag) | |
| Constellation: | Cyg | |
| Distance: | 3,900 Ly | |
| Notes: | NGC6811 is a loose open star cluster in Cygnus. Because of an unusual distribribution of the stars, NGC6811 is known as 'Hole in a Cluster'. | |
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Exposure data |
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| Date: | 2008-09-09 | |
| Location: | Nussbach / Austria (400m) | |
| Telescope: | 12" Newtonian telescope (f=1139mm) | |
| Camera: | ST2000XM with CFW8 and SBIG Filters | |
| Binning: | L 1x1 / RGB 1x1 | |
| Exposure time: | L 30x2m / R 6x8m / G 7x4m / B 7x4m | |
| Exposure time total: | 2h 44m | |
| Notes: | bright moon light during exposure | |
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