IC 1722

IC 1722

IC 1722 is a spiral galaxy in the constellation Sculptor about 191 million ly from Earth. It spans roughly 84,000 ly, about 84% of our Milky Way's width. It is receding from us at about 4,083 km/s.

Illustration from its catalogued shape, not a photograph

Spiral
type · SABb
191 million ly
from Earth · from redshift
84k ly
across
14.8
apparent magnitude
4,083 km/s
receding (RC3)

Because its light is 191 million ly from home, you are seeing IC 1722 as it looked roughly 191 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 1724Lenticular12 million ly
apart
IC 1759Barred spiral13 million ly
apart
NGC 491Barred spiral17 million ly
apart
NGC 749Lenticular22 million ly
apart
NGC 689Spiral24 million ly
apart
NGC 491ASpiral27 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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