NGC 7789 (Cas)

NGC 7789 (Cas)

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Date/Site: 9. September 2023. Remote observatory on the AAR club's site in Presberg
Exposure/
Filter:		 RGB: 37 x 300 seconds (-10°C)
Camera/
Optics/
Instrument:		 Touptek 294CP on 150mm f/5 Newton with 2" Skywatcher Comacorrector
Data acquired remotely with N.I.N.A.,
Guiding: ASI120 attached to a 61mm-finder,
Focusing with Microtouch,
Calibration and processing: PixInsight 1.8

Amateurs often call this open starcluster „Carolines Rose“: It was discovered by Caroline Herschel in 1783 and reminds some of a swarm of bees.
Wikipedia has this information:
"Distance from the solar system is about 8000 lightyears, diameter of about 65 lightyears and contains approximately 15000 stars".

© Friedhelm Hübner, last revision:  03.12.2023