NGC 5109

NGC 5109 is a spiral galaxy in the constellation Ursa Major about 99 million ly from Earth. It spans roughly 46,000 ly, about 46% of our Milky Way's width. It is receding from us at about 2,122 km/s.

Because its light is 99 million ly from home, you are seeing NGC 5109 as it looked roughly 99 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).