IC 1583

IC 1583 is a lenticular galaxy in the constellation Andromeda about 338 million ly from Earth. It spans roughly 59,000 ly, about 59% of our Milky Way's width. The light reaching us tonight left it about 338 million years ago.

Because its light is 338 million ly from home, you are seeing IC 1583 as it looked roughly 338 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).