IC 1689

IC 1689

IC 1689 is a lenticular galaxy in the constellation Pisces about 212 million ly from Earth. It spans roughly 38,000 ly, about 38% of our Milky Way's width. The light reaching us tonight left it about 212 million years ago.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0
212 million ly
from Earth · from redshift
38k ly
across
14.8
apparent magnitude

Because its light is 212 million ly from home, you are seeing IC 1689 as it looked roughly 212 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 1690Lenticular490,000 ly
apart
NGC 483Barred spiral5.5 million ly
apart
NGC 561Spiral6.1 million ly
apart
IC 1680Lenticular6.2 million ly
apart
NGC 571Barred spiral7.0 million ly
apart
NGC 499Elliptical7.3 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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