IC 1783

IC 1783

IC 1783 is a barred spiral galaxy in the constellation Fornax about 155 million ly from Earth. It spans roughly 89,000 ly, about the width of our Milky Way. It is receding from us at about 3,309 km/s.

Illustration from its catalogued shape, not a photograph

Barred spiral
type · Sb
155 million ly
from Earth · from redshift
89k ly
across
12.5
apparent magnitude
3,309 km/s
receding (RC3)

Because its light is 155 million ly from home, you are seeing IC 1783 as it looked roughly 155 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
NGC 857Lenticular4.7 million ly
apart
IC 1788Barred spiral11 million ly
apart
NGC 922Barred spiral26 million ly
apart
IC 1724Lenticular29 million ly
apart
IC 1759Barred spiral29 million ly
apart
NGC 491ASpiral32 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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