IC 4688

IC 4688

IC 4688 is a spiral galaxy in the constellation Ophiuchus about 281 million ly from Earth. It spans roughly 110,000 ly, about the width of our Milky Way. The light reaching us tonight left it about 281 million years ago.

Illustration from its catalogued shape, not a photograph

Spiral
type · Sc
281 million ly
from Earth · from redshift
106k ly
across
14.6
apparent magnitude

Because its light is 281 million ly from home, you are seeing IC 4688 as it looked roughly 281 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 4691Elliptical9.1 million ly
apart
IC 4676Galaxy12 million ly
apart
IC 1268Spiral36 million ly
apart
NGC 6635Lenticular36 million ly
apart
NGC 6627Barred spiral43 million ly
apart
NGC 6549Barred spiral45 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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