IC 4184

IC 4184 is an elliptical galaxy in the constellation Canes Venatici about 686 million ly from Earth. It spans roughly 66,000 ly, about 66% of our Milky Way's width. The light reaching us tonight left it about 686 million years ago.

Because its light is 686 million ly from home, you are seeing IC 4184 as it looked roughly 686 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).