IC 1561

IC 1561

IC 1561 is a barred spiral galaxy in the constellation Cetus about 183 million ly from Earth. It spans roughly 75,000 ly, about 75% of our Milky Way's width. It is receding from us at about 3,912 km/s.

Illustration from its catalogued shape, not a photograph

Barred spiral
type · SBb
183 million ly
from Earth · from redshift
75k ly
across
15.2
apparent magnitude
3,912 km/s
receding (RC3)

Because its light is 183 million ly from home, you are seeing IC 1561 as it looked roughly 183 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 167Barred spiral5.5 million ly
apart
IC 1562Barred spiral6.2 million ly
apart
NGC 168Lenticular6.4 million ly
apart
NGC 177Spiral6.8 million ly
apart
NGC 171Spiral14 million ly
apart
IC 1601Barred spiral17 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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