NGC 2398

NGC 2398 is an elliptical galaxy in the constellation Gemini about 412 million ly from Earth. It spans roughly 140,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 412 million years ago.

Because its light is 412 million ly from home, you are seeing NGC 2398 as it looked roughly 412 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).