Messier 46
Messier 46 |
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Object data of M46 |
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| Object type: | open star cluster (II2r) | |
| Size: | 27' | |
| Magnitude: | 6.1 mag | |
| Constellation: | Pup | |
| Distance: | 4,500 Ly | |
| Notes: |
Messier 46 is a very rich star cluster, with 150 stars of mag 10-13 and
probably a total population of over 500. As a special and famous feature
which is also obvious in the above image, a planetary nebula (NGC 2438)
appears within the apparent borders of M46. This nebula is most probably not
a true member but is superimposed, or perhaps a passing guest. The object identification image shows a further planetary nebula: M 1-18 is much fainter than NGC2438. A further open star cluster can be found near the right border of the above image (NGC 2425). The mosaic image shows the nearness of M46 to M47. |
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Exposure data |
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| Date: | 2011-03-11 | |
| Location: | Nussbach / Austria (400m) | |
| Telescope: | TeleVue NP101 (4" Apo f=540mm) | |
| Camera: | EOS1000D (ISO400) | |
| Mount: | WAM 650 | |
| Exposure time: | 67x2m | |
| Exposure time total: | 2h 14m | |
| Notes: | captured in a night with bad seeing. So, no image with the Newtonian telescope was made. | |
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