IC 2103

IC 2103

IC 2103 is a spiral galaxy in the constellation Mensa about 200 million ly from Earth. It spans roughly 120,000 ly, about the width of our Milky Way. It is receding from us at about 4,263 km/s.

Illustration from its catalogued shape, not a photograph

Spiral
type · Sc
200 million ly
from Earth · from redshift
117k ly
across
14.7
apparent magnitude
4,263 km/s
receding (RC3)

Because its light is 200 million ly from home, you are seeing IC 2103 as it looked roughly 200 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 2089Spiral23 million ly
apart
NGC 2199Spiral26 million ly
apart
NGC 1956Spiral28 million ly
apart
IC 2160Barred spiral29 million ly
apart
NGC 2012Elliptical29 million ly
apart
NGC 2144Spiral33 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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