NGC 4942

NGC 4942 is a spiral galaxy in the constellation Virgo about 82 million ly from Earth. It spans roughly 40,000 ly, about 40% of our Milky Way's width. The light reaching us tonight left it about 82 million years ago.

Because its light is 82 million ly from home, you are seeing NGC 4942 as it looked roughly 82 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).