NGC 3258B

NGC 3258B is a lenticular galaxy in the constellation Antlia about 100 million ly from Earth. It spans roughly 31,000 ly, about 31% of our Milky Way's width. The light reaching us tonight left it about 100 million years ago.

Because its light is 100 million ly from home, you are seeing NGC 3258B as it looked roughly 100 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).