Sh2-240 / Simeis 147 -
Supernova Remnant in
Taurus
Simeis 147 (aka Sh2-240): Seen towards the constellation Taurus it
covers nearly 3 degrees (6 full moons) on the sky corresponding to a
width of 150 light-years at the stellar debris cloud's estimated
distance of 3,000 light-years. This image represents four hours of
exposure time with an H-alpha filter, transmitting only the light from
recombining hydrogen atoms in the expanding nebulosity and tracing the
regions of shocked, glowing gas. This supernova remnant has an apparent
age of about 100,000 years - meaning light from the massive stellar
explosion first reached Earth 100,000 years ago - but this expanding
remnant is not the only aftermath. The cosmic catastrophe also left
behind a spinning neutron star or pulsar, all that remains of the
original star's core. [Source: NASA's Astronomy Picture of the Day
website]
Apogee U16M camera w Astrodon Gen II filters
Takahashi FSQ Refractor w Robofocus
16 x 15 min for H-Alpha
Paramount ME guided w ST-402 and eFinder
Image acquisition in CCDSoft5
Calibration, Alignment and Sigma Reject combine in Maxim
Levels, Curves in
PS CS4
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it for your screen.
Captured Oct 10th
2010
Flesherton, Ontario
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