IC 4447

IC 4447

IC 4447 is a lenticular galaxy in the constellation Boötes about 199 million ly from Earth. It spans roughly 48,000 ly, about 48% of our Milky Way's width. It is receding from us at about 4,280 km/s.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0-a
199 million ly
from Earth · from redshift
48k ly
across
14.7
apparent magnitude
4,280 km/s
receding (RC3)

Because its light is 199 million ly from home, you are seeing IC 4447 as it looked roughly 199 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 5642Elliptical3.7 million ly
apart
NGC 5641Spiral7.2 million ly
apart
IC 4442Barred spiral7.6 million ly
apart
IC 4403Barred spiral8.7 million ly
apart
IC 1012Barred spiral8.8 million ly
apart
IC 4452Spiral12 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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