NGC 3099

NGC 3099 is an elliptical galaxy in the constellation Leo Minor about 706 million ly from Earth. It spans roughly 240,000 ly, about 2.4 times the width of our Milky Way. The light reaching us tonight left it about 706 million years ago.

Because its light is 706 million ly from home, you are seeing NGC 3099 as it looked roughly 706 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).