NGC 5391

NGC 5391 is an elliptical galaxy in the constellation Canes Venatici about 878 million ly from Earth. It spans roughly 130,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 878 million years ago.

Because its light is 878 million ly from home, you are seeing NGC 5391 as it looked roughly 878 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).