NGC 3455

NGC 3455 is a spiral galaxy in the constellation Leo about 52 million ly from Earth. It spans roughly 34,000 ly, about 34% of our Milky Way's width. It is receding from us at about 1,113 km/s.

Because its light is 52 million ly from home, you are seeing NGC 3455 as it looked roughly 52 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).