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M74 is a face on spiral galaxy,
with a low superficial brightness. M74 is in the Piscis constellation,
a little more than 1° to the East of Eta Piscium. The spiral arms
are rich in H-alpha emission regions, of red colour.
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| Optics | Newton 310mm
Maccagnan |
| Focal Lenght | 1560mm |
| Focal Ratio | f/5 |
| Exposure Time and filters | LRGB
55:30:35:45 (single
exposures of 5 min), total exposure 2h45m |
| CCD | FLI ME2 |
| Sensor | Kaf-402me grade 2 |
| Chip temperature | -34°C |
| Location | Passo Maniva (BS, in Italian Alps) at 2150m |
| Date and time of exposure start | 29 october 2005, 19.25 UT |
| Mount | Gemini G41 |
| Tracking | ST4 with
Pentax 75 at 1000mm |
| Temperature and humidity | T=3°C, RH=39% |
| Notes | |
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