IC 25

IC 25

IC 25 is a lenticular galaxy in the constellation Cetus about 272 million ly from Earth. It spans roughly 68,000 ly, about 68% of our Milky Way's width. It is receding from us at about 5,820 km/s.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0-a
272 million ly
from Earth · from redshift
68k ly
across
15.3
apparent magnitude
5,820 km/s
receding (RC3)

Because its light is 272 million ly from home, you are seeing IC 25 as it looked roughly 272 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 1571Barred spiral11 million ly
apart
IC 1557Lenticular19 million ly
apart
NGC 161Lenticular20 million ly
apart
IC 12Barred spiral20 million ly
apart
NGC 78BLenticular21 million ly
apart
NGC 219Elliptical22 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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