M1, named crab bebula, is the remanent
of the supernova of 1054. If the explosions is now, we can observe of
magnitude -17, brighter than the full Moon, and so the deepsky imaging
would be impossible for months... The nebula show red details, due to
the ionized hydrogen that is disposed along the lines of the magnetic
field, very strong. Apart other minor monochromatic emissions, the
other linght is from "white" emission, and so the nebula structures are
better visible in the blue and green channel.
|
Technical Data
|
| Optics |
Newton 310mm
Maccagnan
|
| Focal Lenght |
1560mm |
| Focal Ratio |
f/5 |
| Exposure Time
and filters |
LRGB
75:30:25:25 (single
exposures of 5 min), total exposure 2h45m
|
| CCD |
FLI ME2 |
| Sensor |
Kaf-402me
grade 2 |
| Chip
temperature |
-34°C |
| Location |
Tradate (VA,
in Pianura
Padana, Italy) at 300m |
| Date and time
of exposure
start |
29 december
2005, 20.44
UT |
| Mount |
Gemini G41 |
| Tracking |
ST4 with
Pentax 75 at 1000mm
|
| Temperature
and humidity |
T=-10°C,
RH=30% |
| Notes |
|
