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M3 (CVn)
Click on the image for a larger version
| Date/Site: |
25. April 2020. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filters: |
R: 22 x 60 seconds,
G: 17 x 60 seconds,
B: 13 x 60 seconds (-20°C) |
| Camera: |
QSI 632 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4 Newton with Baader RCC1 on 10Micron GM1000 HPS |
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unguided,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
calibration and processing: PixInsight 1.8 |
There has to be a picture of M3 in this gallery.
Several years earlier I tried my luck with this globular, but obviously I didn't like the result very much:
M3 (CVn)
Click on the image for a larger version
| Date/Site: |
May 17th, 2012, AAR-observatory in Presberg |
Exposure/
Filter: |
L: 6 x 120 seconds (-20°C) |
| Camera: |
SBIG ST10XME, CFW9 with SBIG LRGB-Filters |
Optics/
Instrument: |
10“-Ritchey-Chrétien on AP1200
Guiding off-axis with Lodestar |
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Focusing with Robofocus |
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Calibration and deblooming: MaximDL 5
processing: PixInsight 1.7 and Photoshop |
The colourframes were discarded because of strong gradients.
As there is not really much to show from 2012 the picture is presented.
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© Friedhelm Hübner, last revision: 03.12.2023