NGC 5931

NGC 5931 is a lenticular galaxy in the constellation Serpens about 610 million ly from Earth. It spans roughly 280,000 ly, about 2.8 times the width of our Milky Way. The light reaching us tonight left it about 610 million years ago.

Because its light is 610 million ly from home, you are seeing NGC 5931 as it looked roughly 610 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).