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M51 (CVn)
Click on the image for a larger version
| Date/Site: |
14. February, 6. and 7. March and 14. and 15. May 2021. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
R: 37 x 180 seconds,
G: 30 x 180 seconds,
B: 24 x 180 seconds,
L: 175 x 180 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: Lodestar attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
processing: MaximDL 6 and PixInsight 1.8 |
Because of the bigger chip of the Moravian an object like M51 can be presented in a larger context. Many galaxies surround the interacting NGC 5195 and M51, while several more distant galaxy clusters can be seen in the background.
The small elliptical galaxy NGC 5198 sports a tidal stream in an image by Marc Hanson, reaching over to a dwarf galaxy in it's west. Unfortunately there is no trace of it in my image, however it can be seen in the inverted and enhanced luminance:
M51 (CVn) with the tidal tail of NGC 5198
Click on the image for a larger version
Take a look at the extraordinary work of Fabian Neyer. In this ultralong exposed image this tidal stream, several other tidal tails, Hα-clouds around M51 and IFN-cirrus are depicted prominently.
And with this help even in my comparatively short exposure several of these features are detectable.
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© Friedhelm Hübner, last revision: 03.12.2023