IC 1997

IC 1997

IC 1997 is a spiral galaxy in the constellation Reticulum about 254 million ly from Earth. It spans roughly 75,000 ly, about 75% of our Milky Way's width. The light reaching us tonight left it about 254 million years ago.

Illustration from its catalogued shape, not a photograph

Spiral
type · Sa
254 million ly
from Earth · from redshift
75k ly
across
13.5
apparent magnitude

Because its light is 254 million ly from home, you are seeing IC 1997 as it looked roughly 254 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
IC 2017Lenticular8.6 million ly
apart
IC 2010Spiral9.0 million ly
apart
NGC 1534Lenticular21 million ly
apart
NGC 1529Lenticular24 million ly
apart
NGC 1490Elliptical31 million ly
apart
NGC 1526Spiral31 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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