NGC 6581

NGC 6581 is an elliptical galaxy in the constellation Hercules about 209 million ly from Earth. It spans roughly 37,000 ly, about 37% of our Milky Way's width. The light reaching us tonight left it about 209 million years ago.

Because its light is 209 million ly from home, you are seeing NGC 6581 as it looked roughly 209 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). Distance computed by gravityfinder from redshift via Hubble's law (H0 = 70 km/s/Mpc).