M3 (CVn)

M3 (CVn)

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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
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
Focusing with Robofocus
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.
 

© Friedhelm Hübner, last revision:  17.01.2021