NGC 5504B

NGC 5504B is a barred spiral galaxy in the constellation Boötes about 244 million ly from Earth. It spans roughly 40,000 ly, about 40% of our Milky Way's width. The light reaching us tonight left it about 244 million years ago.

Because its light is 244 million ly from home, you are seeing NGC 5504B as it looked roughly 244 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).