M 45 - Pleiades
M 45 - Pleiades |
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Object data of M45 |
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| Object type: | open star cluster (I3r) with reflection nebula | |
| Size: | 110' | |
| Magnitude: | 1.6 mag | |
| Constellation: | Tau | |
| Distance: | 440 Ly | |
| Notes: |
The Pleiades nebulae are blue-colored, which indicates that they are
reflection nebulae, reflecting the light of the bright stars situated near (or
within) them. Physically, the reflection nebula is probably part of the dust
in a molecular cloud, unrelated to the Pleiades cluster, which happens to
cross the cluster's way. It is not a remainder of the nebula from which the
cluster once formed. One can find many different catalogue entries for the reflection nebulae:
Many background galaxies are visible behind the Pleiades, as can be seen more clearly in the top left quarter of the 150% resolution image. Maybe these galaxies are members of the galaxy cluster Zwicky 905. |
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Exposure data |
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| Date: | 2009-11-19 | |
| Location: | Nussbach / Austria (400m) | |
| Telescope: | TeleVue NP101 (4" Apo f=540mm) | |
| Camera: | ST2000XM with CFW8 and Baader Filters | |
| Binning: | L 1x1 / RGB 1x1 | |
| Exposure time: | L 24x2m / R 6x5m / G 6x5m / B 6x5m | |
| Exposure time total: | 2h 18m | |
| Notes: | ||
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