The Home Observatory is open and gathering data every chance I get. While waiting for new projects to be completed I process existing data and it is time to show you Messier 45 or the Pleiades. I also thought it would be fun to compare my new image to an image I made 2 years ago as one of my first objects, using my Canon 60D DSLR OSC camera.

Messier 45, the Pleiades or the Seven Sisters, is an open star cluster in the constellation Taurus. It is the closest Messier object to Earth and also the most obvious star cluster to the naked eye in the starry sky. The cluster consists of over 1,000 confirmed objects and has an estimated mass of about 800 times that of our Sun. It is dominated by hot blue luminous stars that have formed in the last 100 million years but is estimated to consist of up to 25% brown dwarfs despite contributing only less than 2% of the mass. A brown dwarf is an object with less than 8% of the mass of our Sun and not heavy enough to start a nuclear reaction to become a true star.

Data for this image: 31x120s L, 12x300s L, 31x120s R, 31x120s G, 41x120s B.
Total number of exposures 146 with a total integration time of 5.4 hours.
Processing: PixInsight with LRGB palette with LRGB stars.

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My equipment
SkyWatcher HEQ5 Pro (belt mod and SKF bearings)
SkyWatcher EvoStar 80ED Pro (0,85x FF/FR)
SkyWatcher EvoGuide 50ED
ZWO ASI294MM Pro
ZWO ASI120MM Mini
ZWO EAF Automatic Focuser
ZWO EFW Electronic Filter Wheel, 7 position 36mm
ZWO LRGB broadband and SHO narrowband filters

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