Pleiades and dusty surroundings (Sebastian B.)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: IC 353 · Maia nebula · Merope nebula · NGC 1432 · NGC 1435 · The star 18Tau · The star 32Tau · The star Atlas (27Tau) · The star Celaeno (16Tau) · The star Electra (17Tau) · The star Merope (23Tau) · The star Pleione (28Tau) · The star Sterope I (21Tau) · The star Taygeta (19Tau) · The star ηTau

Pleiades and dusty surroundings, Sebastian B.

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Pleiades and dusty surroundings

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Pleiades and dusty surroundings

The Pleiades (M45). One of the most popular objects for visual astronomy. It is bright, six times bigger than the full-moon and is just beautiful. They are even on the famous Nebra Sky Disk. But it was a much tougher DSO for me to shoot than I thought it would be. I had so much color noise to deal with. In the first night imaging M45 I already saw in my stretched data that there is a lot of color noise going on. Especially in the bottom left. So I collected in two more sessions about 7h 20mins of lights and about 100 darks. I thought that this would make a better signal to noise ratio -and it gladfully did- but overall it did not nearly improve as well as I hoped it would. So... after using all the techniques I know to reduce noise in PS and Lr it turned out a little bit blurry, the colors are a little off and so on but it reduced at least some of the color noise. I don‘t know if it‘s my fault or the camera sensor, but I always have more color noise on the bottom left than anywhere else. I‘m aware of that DSLR‘s produce more color noise than dedicated astro cams but since a couple of weeks I usually shoot at about 0 to -3 C ambient, I programmed the timer to take a short break before starting the next release and waited about 30 to 45 mins to acclimate the camera before the first release.

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