Open star cluster M45 Pleiades

 Posted: Aug 30th, 2025
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NGC
IC
HD
Technical Info
Telescope/Lens: Sky-Watcher 150/750
Camera: Canon 550 D
Mount: Sky-Watcher HEQ5 PRO SynScan
Software: APT, DeepSkyStacker, FitsWork, FITStacker, Lightroom, StraNet2GUI, Photoshop, Topaz Denoise AI
Accessories: Baader MPCC Mark III, iOptron iPolar, Bahtinov mask
Exposure:
671 x 15" ISO/Gain: 3200
Blue zoneLight Pollution:
 Chelyabinsk, Russia
 Aug 23rd, 2025
2 h 48 m
1113
The open star cluster Pleiades Messier 45
This is one of the closest clusters to us (443 light years).
Despite the fact that the second name of the cluster is the Seven Sisters - in a telescope you can see much more than seven. And in reality there are about 3000.
If you look closely at the photo, reflection nebulae such as the Maia Nebula and the Merope Nebula have appeared around the hot blue stars - named after the stars whose light they reflect.

Equipment and software:
Camera Canon EOS 550 D.
Telescope Synta SkyWatcher 150/750, F/5
Mount HEQ-5 Pro
Bahtinov mask
Polar alignment camera iOptron iPolar
Baader MPCC Mark III coma corrector

Software for shooting:
Astrophotography Tool
SharpCap (polar alignment)
EQ-Mode
ASCOM
Cartes Du Ciel

Shooting from 08-22-23.2025, near the village of Stepninskoye, Chelyabinsk region
Blue zone of light pollution. Class 4 on the Bortle scale
Total 671 Light frames of 15 seconds + 20 Dark frames + 20 Bias frames
ISO 3200

Total accumulated signal Σ=2h47'45"

Software for post-processing:
DeepSkyStacker
FitsWork
FITStacker
Lightroom
StraNet2GUI
Photoshop
Topaz Denoise AI
Resolution: 4956x3110 px
Scale: 6804 KB
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