IC 4581

IC 4581 is a spiral galaxy in the constellation Corona Borealis about 465 million ly from Earth. It spans roughly 110,000 ly, about the width of our Milky Way. It is receding from us at about 9,973 km/s.

Because its light is 465 million ly from home, you are seeing IC 4581 as it looked roughly 465 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).