NGC 3545B

NGC 3545B is an elliptical galaxy in the constellation Ursa Major about 404 million ly from Earth. It spans roughly 52,000 ly, about 52% of our Milky Way's width. The light reaching us tonight left it about 404 million years ago.

Because its light is 404 million ly from home, you are seeing NGC 3545B as it looked roughly 404 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).