DEEPSKY SPACE OBJECT | LRGB | WIDEFIELD THE TWEEDLE DEE & TWEEDLE DUM STAR CLUSTERS - 250mm (Thomas ArtOfPix Großschmidt)

DEEPSKY SPACE OBJECT | LRGB | WIDEFIELD THE TWEEDLE DEE & TWEEDLE DUM STAR CLUSTERS - 250mm

DEEPSKY SPACE OBJECT | LRGB | WIDEFIELD
THE TWEEDLE DEE & TWEEDLE DUM STAR CLUSTERS

After a somewhat longer break, finally another one of my own shots ^^
Only a rather short exposure of about 3h24min, but always there :-)
After weeks of renovation work on my balcony, and now almost 2 weeks knocked out with multiple infections, I'm finally feeling a bit better again and my telescope is also back in its permanent place. So, to warm up for the coming fall/winter season, here's a fading image of the slowly fading summer Milky Way ;-)

Derived from the story, “Alice in Wonderland”, these two twinkling star clusters, somewhat on the edge of the summer Milky Way band, are called Tweedle Dee and Dweedle Dum :-)
NGC 6633, the Tweedle Dee star cluster (also called Graff's cluster, left in the image) is an open star cluster of Trumpler type III2m in the constellation of the Serpent Bearer on the ecliptic. It has a magnitude of 4.6 mag and an angular diameter of 20 arcminutes. The cluster is around 1,300 light years away from the solar system and has a diameter of around 8 light years. It contains almost 30 stars and is estimated to be 600 - 700 million years old.
IC 4756, the Tweele Dum star cluster (top right), is also an open star cluster of Trumpler type III2m but already in the constellation Serpens, which has an apparent magnitude of 4.6 mag.

| Obj.Type | NGC6633, IC4756 StarClusters
| Constell. | Ophiuchus
| Distance | ~1400 lightyears away
| Mount | Skywatcher AZ-EQ6Pro GT
| Guiding | PHD2, 50” Holocal, ZWO120Mini
| Camera | Touptek2600c, 3.76 µm, -10°C Bin 1x1
| Optic | WO RedCat 51 f/4.9 250mm
| RGB | OSC Antlia TriRGB 57x 180s
| LUM | OSC Antlia V-Pro-L 68x 180s
| Location | ArtOfPix Balcony Observatory, Tulln, Austria

Image processing:
Mainly Pixinsight, Photoshop, Lightroom, GraXpert & Denoise, BTX Blur Terminator, Star X Terminator

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Unknown

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Status	Advanced success
Started	...
PixInsight job	TUA2VGA98Y82Y98GESAPL9DJTO42KMGT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h33m58s.30
RA (top/left)	18h23m22s.41
RA (top/right)	18h44m19s.30
RA (bottom/right)	18h44m37s.78
RA (bottom/left)	18h23m34s.90

Dec (center)	+05°35′56″.3
Dec (top/left)	+04°01′56″.0
Dec (top/right)	+03°55′51″.8
Dec (bottom/right)	+07°09′28″.4
Dec (bottom/left)	+07°15′22″.8

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