IC 4923

IC 4923 is a lenticular galaxy in the constellation Telescopium about 312 million ly from Earth. It spans roughly 94,000 ly, about the width of our Milky Way. It is receding from us at about 6,700 km/s.

Because its light is 312 million ly from home, you are seeing IC 4923 as it looked roughly 312 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).