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Soap Bubble-Nebula and NGC6888 (Cyg)
Click on the image for a larger version
| Date/Site: |
26. June, 2., 21., 22. and 30. July 2021. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
OIII: 26 x 480 seconds,
Hα: 39 x 480 seconds (-20°C) |
| Camera: |
Moravian G3-16200 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4,7 Newton with VIP-3010 Paracorr on 10Micron GM1000 HPS |
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Guiding: ASI120 attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander with MaximDL 6,
processing: MaximDL 6 and PixInsight 1.8 |
I focused on the planetary PK
G75.5+1.7, also called the "soap bubble", instead of
NGC 6888. As the thin shell of ionized gas emits exclusively in Hα and OIII only these filters were used.
Here is a "moderate" version, where a synthetic green channel was generated with a method developed by Steve Cannistra.
S
oap bubble-nebula and NGC6888 (Cyg)
seifenblase-hoo-2021.jpg
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© Friedhelm Hübner, last revision: 03.12.2023