PN Abell 21 - Medusa Nebula
PN Abell 21 - Medusa Nebula |
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Object data of PN Abell21 |
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| Object type: | Planetary nebula | |
| Size: | 12' | |
| Magnitude: | 10.2 mag | |
| Constellation: | Gem | |
| Distance: | 1,500 Ly | |
| Notes: | Abell 21, the Medusa Nebula is an old planetary nebula in constellation Gemini. Its distance is estimated to be about 1,500 light years. | |
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Exposure data |
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| Date: | 2017-02-14 + 2017-02-15 + 2017-02-16 | |
| Location: | Nussbach / Austria (400m) | |
| Telescope: | 12" Newtonian telescope (f=1120mm) | |
| Camera: | QSI 660wsg-8 with Astrodon filters | |
| Binning: | L 1x1 / RGB 1x1 / Ha 5nm 1x1 / [OIII] 3nm 1x1 | |
| Mount: | ASA DDM85 | |
| Exposure time: | L 42x2min / RGB 15x2min each / Ha 34x8min / [OIII] 36x8min | |
| Exposure time total: | 12h 14min | |
| Notes: | Image acquisition in 3 nights with bright moon | |
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