M45 - Pleiades or "the seven sisters" (Christian Großmann)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 16 Tau · 17 Tau · 18 Tau · 19 Tau) · 19 q Tau · 20 Tau · 21 Tau · 22 Tau · 23 Tau · 24 Tau · 25 Tau) · 25 eta Tau · 26 Tau · 27 Tau · 28 Tau · Alcyone · Asterope · Atlas · Barnard's Merope Nebula · Celaeno · Electra · HD22886 · HD23155 · HD23156 · HD23157 · HD23194 · HD23246 · HD23289 · HD23325 · HD23326 · And 61 more.

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M45 - Pleiades or "the seven sisters"

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M45 - Pleiades or "the seven sisters"

To me, M45 was always one of the "beginner targets". But the star cluster is also really fascinating to me. But every time the Pleiades were on a position in the sky, where it is worth to take photographs, I decided to go for another object. The reason was, that I thought of getting a wider shot of it and the focal lengths combined with the sensor size didn't fit my imaginations. But this year I got another camera that allows me to change my setups a bit. So I was able to use my 350 TS refractor together with my ZWO ASI294MM Pro. Now, the Field of view fits M45 really well.

For the first time ever, I decided to take the images with the full sensor resolution of the IMX492. during processing, I realized, that it was really overkill. Before the session, I managed to analyze the focus shift of the filter set I use. This allowed me to take images of all LRGB filters after one another (3xL, 1xR, 1xG, 1xB). Until this day, I used every filter itself for a longer time. But imaging the filters one after the other showed a much better color distribution in the final image, because the conditions were nearly the same for all the sub frames.

I really like the result I got. The nebula is really bright, but there are also some faint details around the cluster. I like the framing as well and the FOV is really optimal to my taste. Should I do M45 ever again, I would decrease the exposure time for the Luminance filter. But the rest of the data is quite good for my setup. Because of the resolution, processing takes quite a while.

Astrophotography Germany
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Status	Advanced success
Started	...
Astrometry.net job	9083295
PixInsight job	I1D0JOHR3IW5P8B68EDVZLWC2F6USVP0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h46m55s.23
RA (top/left)	03h54m07s.90
RA (top/right)	03h40m23s.14
RA (bottom/right)	03h39m50s.70
RA (bottom/left)	03h53m20s.70

Dec (center)	+24°07′11″.7
Dec (top/left)	+25°02′45″.9
Dec (top/right)	+25°16′20″.3
Dec (bottom/right)	+23°10′20″.9
Dec (bottom/left)	+22°57′00″.5

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M45 - Pleiades or "the seven sisters"

M45 - Pleiades or "the seven sisters"

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M45 - Pleiades or "the seven sisters"

M45 - Pleiades or "the seven sisters"

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