In 1054, Chinese astronomers reported that a new bright star appeared in the direction of the constellation bull. It was a supernovae that occurred and whose brilliance is so intense that it could be seen in broad daylight for almost a month.
Since then, the filamentous ejecta of the star is in perpetual expansion at a speed of 1500 km/s. At the center of this supernova remnant called the crab nebula that carries the first digit of the Messier catalog (M 1), is the residue of the star namely a very energetic pulsar that rotates on itself at the rate of 30 times per second.
Technical details:
– C11hd at F/D 10
– 10 micron GM 2000 combi Mount
– Asi 294 mm pro
– Antlia filter 3.5 nm
– Sampling: 0.34 arcsec
– 64x180s HA : 3 h 12 min
– 36x300s O3 : 3 h
– 36x300s S2 : 3 h
– Full integration: 9 h 12 min
– DOF: 31/149/25
– Date: 11 and 12/11/2021
– Location: Oukaimeden HAO Observatory, Morocco