M 6 - Butterfly Cluster
M 6 - Butterfly Cluster |
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Object data of M6 |
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| Object type: | open cluster (II3r) | |
| Size: | 25' | |
| Magnitude: | 4.2 mag | |
| Constellation: | Sco | |
| Distance: | 1,600 Ly | |
| Notes: |
M6 is a young open star cluster in the constellation Scorpius (age: 100
million years). The brightest star in this cluster is the variable star BM Scorpii, a yellow supergiant (spectral type K3). BM Sco is a semiregular variable star, with its apparent magnitude varying between mag 5.5 and 7. |
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Exposure data |
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| Date: | 2009-09-12 + 14 +15 | |
| Location: | La Palma / Spain (1700m) | |
| Telescope: | TeleVue NP101 (4" Apo f=540mm) | |
| Camera: | ST2000XM with CFW8 and Baader Filters | |
| Binning: | L 1x1 / RGB 1x1 | |
| Exposure time: | L 36x2m / R 6x5m / G 6x5m / B 6x5m | |
| Exposure time total: | 2h 42m | |
| Notes: | bad seeing and high clouds during luminance exposures | |
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