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Sh2-224 (Aur)
Click on the image for a larger version
| Date/Site: |
10. November, 2., 4., 18., 19. December 2019 and 16. January 2020. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
R: 68 x 180 seconds,
G: 69 x 180 seconds,
B: 74 x 180 seconds,
Hα: 48 x 600 seconds,
O3: 56 x 600 seconds (-20°C) |
| Camera: |
QSI 632 with Astronomik Type II-filters |
Optics/
Instrument: |
80mm f/5 SW Esprit on 10Micron GM1000 HPS |
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Guiding: Lodestar attached to a 50mm-finder,
focusing: Robofocus and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
processing: MaximDL 6 and PixInsight 1.8 |
A supernova remnant I stumbled across rather by chance while the scanning through the „Tirion“ in 2016, when I tried to capture the pretzel for the first time:
Sh2-224 (Aur)
Click on the image for a larger version
| Date/Site: |
30. November, 4. and 29. December 2016, AAR-observatory in Presberg |
Exposure/
Filter: |
RGB each 3 x 300 seconds,
Hα 22 x 600 and 4 x 900 seconds,
O3 15 x 900 seconds (-20°C) |
| Camera: |
QSI 632 with SBIG- and Baader-filters
off-axis-guiding with Lodestar |
Optics/
Instrument: |
10" f4-Newton on AP1200, RCC1 coma-corrector |
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Focusing with RoboFocus and FocusMax,
automatic image acquisition with CCD-Commander and MaximDL 6,
calibration: MaximDL 6, processing: PixInsight 1.8 |
The field of view of the QSI 632 on the 10-inch Newton is too small to capture the second bubble immediately to the west.
This was by far the dimmest pretzel I ever came across. A single O3-frame shows almost nothing.
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© Friedhelm Hübner, last revision: 03.12.2023