NGC 4559A

NGC 4559A is a spiral galaxy in the constellation Coma Berenices about 348 million ly from Earth. It spans roughly 41,000 ly, about 41% of our Milky Way's width. The light reaching us tonight left it about 348 million years ago.

Because its light is 348 million ly from home, you are seeing NGC 4559A as it looked roughly 348 million years ago. The photons left before that much of history had passed, and are only now reaching us. This distance is estimated from the galaxy's redshift, so the lookback time is approximate.

Source: structural data (position, morphology, brightness, redshift) from OpenNGC (CC BY-SA). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).