I think that the comet would desintegrate quicker than with speed of sound, and more like with the speed of incoming gases that is 600 km/sec, so it would be destroed in less than 1 second. Comet is not asteroid - it is very fragile and it will start to desinegrate even before the impact bacuse of gravitational forces—it will be inside Roshe limit of Sun and tidal forses will start to elongate it.
The mass of whatever the impactor is has to be brought to a halt and for a 100 km chunk massing as much as you’ve computed, that’s not happening in an instant in the photosphere of the Sun. Computing exactly how long is a non trivial task and at that speed is more like the injection of a supersonic fluid through a much lower density medium since the internal strength, heat capacity and even the ionization energy of the object is trivial against the kinetic energy it is dissipating.
I think that the comet would desintegrate quicker than with speed of sound, and more like with the speed of incoming gases that is 600 km/sec, so it would be destroed in less than 1 second. Comet is not asteroid - it is very fragile and it will start to desinegrate even before the impact bacuse of gravitational forces—it will be inside Roshe limit of Sun and tidal forses will start to elongate it.
The mass of whatever the impactor is has to be brought to a halt and for a 100 km chunk massing as much as you’ve computed, that’s not happening in an instant in the photosphere of the Sun. Computing exactly how long is a non trivial task and at that speed is more like the injection of a supersonic fluid through a much lower density medium since the internal strength, heat capacity and even the ionization energy of the object is trivial against the kinetic energy it is dissipating.