NGC 4799

NGC 4799 is a spiral galaxy in the constellation Virgo about 129 million ly from Earth. It spans roughly 54,000 ly, about 54% of our Milky Way's width. It is receding from us at about 2,807 km/s.

Because its light is 129 million ly from home, you are seeing NGC 4799 as it looked roughly 129 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).