IC 4745

IC 4745

IC 4745 is a spiral galaxy in the constellation Pavo about 222 million ly from Earth. It spans roughly 130,000 ly, about the width of our Milky Way. It is receding from us at about 4,730 km/s.

Illustration from its catalogued shape, not a photograph

Spiral
type · Sab
222 million ly
from Earth · from redshift
134k ly
across
13.9
apparent magnitude
4,730 km/s
receding (RC3)

Because its light is 222 million ly from home, you are seeing IC 4745 as it looked roughly 222 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 4741Spiral4.1 million ly
apart
IC 4755Spiral7.3 million ly
apart
IC 4750Lenticular7.8 million ly
apart
IC 4784Lenticular9.2 million ly
apart
IC 4696Barred spiral9.4 million ly
apart
NGC 6722Barred spiral9.8 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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