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Object
............................................ Messier 1 - Crab
Nebula
Constellation .............................. Taurus
Distance + Ap. Magnitude......... 6500 Light Years - 8.4
Date + Time ................................. 19&20 / 12 /2013
Location ....................................
Remote imaging from
"Nunki
Observatory" - Skiathos
Optics .........................................
Takahashi
TSA 102
Tools .......................................... The Sky X
Camera ..................................... SBIG
ST-10XE with CFW10 (Astrodon filters)
Exposure Time....................... LHaRGB :
L= 18X300 Ha= 18X600 sec -RGB 3 X 600 (each)
More Details ...........................
Environment Temperature : 7οC Camera Temperature -15οC
Mount ....................................... Paramount
ME
Guiding .................................... Self guided
Processing Details ................ Photoshop ,
Maxim
Notes ........................................
Weather: 8/10 Transparence: 4/6 Humidity :
78-88 %
Target details .........................
The Crab Nebula (catalogue
designations M1, NGC 1952, Taurus A) is a supernova remnant and
pulsar wind nebula in the constellation of Taurus.Corresponding to a
bright supernova recorded by Chinese astronomers in 1054, the nebula
was observed later by John Bevis in 1731. At an apparent magnitude
of 8.4, comparable to that of the largest moon of Saturn, it is not
visible to the naked eye but can be made out using binoculars under
favourable conditions.
At X-ray and gamma ray energies above 30 keV, the Crab is generally
the strongest persistent source in the sky, with measured flux
extending to above 10 TeV. Located at a distance of about 6,500
light-years (2 kpc) from Earth, the nebula has a diameter of 11
light years (3.4 pc, corresponding to an apparent diameter of some 7
arc minutes) and expands at a rate of about 1,500 kilometers per
second (0.5% c). It is part of the Perseus Arm of the Milky Way
galaxy.
At the center of the nebula lies the Crab Pulsar, a neutron star
28–30 km across, which emits pulses of radiation from gamma rays to
radio waves with a spin rate of 30.2 times per second. The nebula
was the first astronomical object identified with a historical
supernova explosion.
The nebula acts as a source of radiation for studying celestial
bodies that occult it. In the 1950s and 1960s, the Sun's corona was
mapped from observations of the Crab's radio waves passing through
it, and in 2003, the thickness of the atmosphere of Saturn's moon
Titan was measured as it blocked out X-rays from the nebula. |
