IC 257

IC 257

IC 257 is an elliptical galaxy in the constellation Perseus about 362 million ly from Earth. It spans roughly 200,000 ly, about 2.0 times the width of our Milky Way. The light reaching us tonight left it about 362 million years ago.

Illustration from its catalogued shape, not a photograph

Elliptical
type · E
362 million ly
from Earth · from redshift
203k ly
across
12.7
apparent magnitude

Because its light is 362 million ly from home, you are seeing IC 257 as it looked roughly 362 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.

Nearest galaxies
NGC 1265Elliptical46 million ly
apart
IC 260Elliptical48 million ly
apart
IC 256Elliptical52 million ly
apart
NGC 1279Lenticular54 million ly
apart
NGC 1077ABarred spiral58 million ly
apart
IC 320Spiral65 million ly
apart
Worlds in the same direction on the sky

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).

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