IC 2507

IC 2507 is an irregular galaxy in the constellation Antlia about 58 million ly from Earth. It spans roughly 30,000 ly, about 30% of our Milky Way's width. The light reaching us tonight left it about 58 million years ago.

Because its light is 58 million ly from home, you are seeing IC 2507 as it looked roughly 58 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).