NGC 4503

NGC 4503 is a lenticular galaxy in the constellation Virgo about 63 million ly from Earth. It spans roughly 64,000 ly, about 64% of our Milky Way's width. It is receding from us at about 1,364 km/s.

Because its light is 63 million ly from home, you are seeing NGC 4503 as it looked roughly 63 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).