NGC 5121A

NGC 5121A is a spiral galaxy in the constellation Centaurus about 67 million ly from Earth. It spans roughly 24,000 ly, about 24% of our Milky Way's width. The light reaching us tonight left it about 67 million years ago.

Because its light is 67 million ly from home, you are seeing NGC 5121A as it looked roughly 67 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). Recession velocity from RC3 (de Vaucouleurs et al. 1991, via NASA/HEASARC, public domain). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).