NGC 7789 - Herschel's Spiral Cluster
NGC 7789 - Herschel's Spiral Cluster |
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Object data of NGC7789 |
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| Object type: | open cluster (II 2 r) | |
| Size: | 16' | |
| Magnitude: | 6.7 mag | |
| Constellation: | Cas | |
| Distance: | 7,600 Ly | |
| Notes: | very old cluster (1.5 billion years) | |
Exposure data |
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| Date: | 2007-12-19 | |
| Location: | Nussbach / Austria (400m) | |
| Telescope: | TeleVue NP101 (4" Apo f=540mm) | |
| Camera: | ST2000XM with CFW8 and SBIG Filters | |
| Binning: | L 1x1 / RGB 1x1 | |
| Exposure time: | L 36x2m / R 8x8m / G 8x4m / B 8x4m | |
| Exposure time total: | 3h 20m | |
| Notes: |
bright moon during exposure! |
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