NGC 3666

NGC 3666 is a barred spiral galaxy in the constellation Leo about 49 million ly from Earth. It spans roughly 49,000 ly, about 49% of our Milky Way's width. It is receding from us at about 1,047 km/s.

Because its light is 49 million ly from home, you are seeing NGC 3666 as it looked roughly 49 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).