NGC 403

NGC 403

NGC 403 is a lenticular galaxy in the constellation Pisces about 237 million ly from Earth. It spans roughly 170,000 ly, about 1.7 times the width of our Milky Way. It is receding from us at about 5,063 km/s.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0-a
237 million ly
from Earth · from redshift
165k ly
across
13.2
apparent magnitude
5,063 km/s
receding (RC3)

Because its light is 237 million ly from home, you are seeing NGC 403 as it looked roughly 237 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 383Elliptical2.3 million ly
apart
NGC 374Lenticular2.8 million ly
apart
NGC 398Lenticular4.3 million ly
apart
NGC 420Lenticular5.2 million ly
apart
NGC 385Elliptical5.3 million ly
apart
NGC 397Lenticular6.1 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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