NGC 2602

NGC 2602 is a lenticular galaxy in the constellation Ursa Major about 622 million ly from Earth. It spans roughly 120,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 622 million years ago.

Because its light is 622 million ly from home, you are seeing NGC 2602 as it looked roughly 622 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).