IC 4442

IC 4442

IC 4442 is a barred spiral galaxy in the constellation Boötes about 195 million ly from Earth. It spans roughly 48,000 ly, about 48% of our Milky Way's width. The light reaching us tonight left it about 195 million years ago.

Illustration from its catalogued shape, not a photograph

Barred spiral
type · SBa
195 million ly
from Earth · from redshift
48k ly
across
15.1
apparent magnitude

Because its light is 195 million ly from home, you are seeing IC 4442 as it looked roughly 195 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 5641Spiral5.8 million ly
apart
IC 4452Spiral6.8 million ly
apart
NGC 5642Elliptical7.3 million ly
apart
IC 4447Lenticular7.6 million ly
apart
NGC 5635Barred spiral7.8 million ly
apart
IC 1012Barred spiral8.2 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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