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M52 (Cas)
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| Date/Site: |
11., 22. and 23. Oktober 2024. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
RGB: 70 x 300 seconds (-10°C),
L: 18 x 400 seconds
Hα: 17 x 600 seconds,
O3: 17 x 600 seconds (-20°C) |
Camera/
Optics/
Instrument: |
Touptek 294CP on 150mm f/5 Newton with 2" Skywatcher Comacorrector,
Moravian G3-16200 with Astronomik Type II-filter on 250mm f/4,7 Newton with VIP-3010 Paracorr on 10Micron GM1000 HPS |
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Data acquired remotely using N.I.N.A.,
Guiding: ASI120 attached to a 61mm-finder,
Focusing with Microtouch,
Calibration with MaximDL 6, processing in PixInsight 1.8 |
A short spell of good weather was used to image the open cluster Messier 52 and the adjacent „Bubble-nebula“ (NGC 7635).
The cluster contains about 600 stars in a distance of about 4600 lightyears.
The 8800 lightyears distant Bubble-nebula is the result of the fierce stellar wind of a massive O-star SAO 20575.
Often ignored is the bipolar planetary nebula KjPn 8, lying close to the Bubble towards the southeast. It is about 5200 lightyears distant.
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© Friedhelm Hübner, last revision: 09.12.2024