Type of Object: The Crab Nebula is the result of a supernova explosion.
The supernova occurred in the year 1054 AD and was observed by astronomers aorund the world. The exploding star remained brighter than Venus for 23 days - easily seen during the day! The nebula emits electromagnetic radiation from x-rays to radio. The driving energy source is a pulsar - the neutron star after the explosion. The neutron star rotates about 30 times per second, is a few kilometers in diameter, and has the mass equivalent to the mass of the Sun.
Distance: 6300 light years (= 6 x 1016 km = 3.7 x 1016 miles)
Size: About 10 light years across (= 9.5 x 1013 km = 5.9 x 1013 miles)
Coordinates (Epoch J2000):
Right Ascension: 05 34 31.97
Declination: +22 00 52.1
Other Names: M1, Taurus A
Radio Brightness at 1420 MHz (21 cm): 930 Jy