How long does it take the furthest stars light to reach Earth? (Which has already reached Earth).?

Question

How long does it take the furthest stars light to reach Earth? (Which has already reached Earth).?

Answer 1

Hipparcos 5926 (V762) in Cassiopeia is 16,308 light-years away but is magnitude 5.84. That's the furthest I know of. A type 1a supernova with an absolute magnitude of -19.5 would be just visible to the naked eye, mag. 6, at a distance of 4,104,097 light years.

The time that it takes for the light to reach Earth is the same as its distance in light years, so that would mean the light from Hipparcos 5926 would have taken 16,308 years to reach Earth.  There are stars farther away, but they are not visible to the naked eye.

Answer 2

I think the furthest stars yet detected are between 10 and 11 billion light years away.  So that means that the light (which is so very faint that we can only see it with long exposures from the HST) left the stars 10 to 11 billion years ago.