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M51 represent very well the spiral
galaxies.
We view M51 exactly from the top. To the north there is an interacting
galaxy (NGC5195) that is tearing an arm of M51.
Here is also imaged a supernova, SN 2005 cs.
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| Optics | 1.37m Cassegrain telescope of the Merate Observatory (Lecco, Italy) |
| Focal Lenght | 7500 mm
(with 0.5x reducer) resolution 0.49"/pix |
| Focal Ratio | f/5.5 |
| Exposure Time | Mosaic of 3 fields, each of 6 min exposure (20x20s) |
| CCD | HiSIS43 |
| Sensor | Kaf-1600e grade 1 (used in binning 2x2) |
| Filters | - |
| Chip temperature | -10°C |
| Location | Merate (LC, in light polluted Pianura Padana, Italy) at 300m |
| Date and time of exposure start | 2 july 2005, h 22.17 TU |
| Mount | Fork mount |
| Tracking | - |
| Temperature and humidity | T=+24°C, RH=40% |
| Notes | The
colors were added
using the other M51 attached image, taken with a SC 20cm +ME2 at Colle
del
Nivolet. Bad seeing, that don't allowed us to use all the resolution potential of this telescope. Coauthors: Lorenzo Comolli, Roberto Crippa, Cesare Guaita, of Gruppo Astronomico Tradatese (GAT), Mauro Ghigo of Osservatorio Astronomico di Brera-Merate (OAB) |
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