NGC 931

NGC 931

NGC 931 is a barred spiral galaxy in the constellation Triangulum about 228 million ly from Earth. It spans roughly 160,000 ly, about 1.6 times the width of our Milky Way. It is receding from us at about 4,914 km/s.

Illustration from its catalogued shape, not a photograph

Barred spiral
type · Sbc
228 million ly
from Earth · from redshift
163k ly
across
14.5
apparent magnitude
4,914 km/s
receding (RC3)

Because its light is 228 million ly from home, you are seeing NGC 931 as it looked roughly 228 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 973Barred spiral9.0 million ly
apart
NGC 953Elliptical10 million ly
apart
IC 1789Spiral11 million ly
apart
IC 1815Lenticular11 million ly
apart
NGC 978AElliptical12 million ly
apart
NGC 940Lenticular12 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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