IC 999

IC 999

IC 999 is a lenticular galaxy in the constellation Boötes about 266 million ly from Earth. It spans roughly 66,000 ly, about 66% of our Milky Way's width. It is receding from us at about 5,738 km/s.

Illustration from its catalogued shape, not a photograph

Lenticular
type · S0
266 million ly
from Earth · from redshift
66k ly
across
14.6
apparent magnitude
5,738 km/s
receding (RC3)

Because its light is 266 million ly from home, you are seeing IC 999 as it looked roughly 266 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 1000Lenticular4.1 million ly
apart
NGC 5628Elliptical9.8 million ly
apart
NGC 5490CBarred spiral11 million ly
apart
IC 982Lenticular16 million ly
apart
IC 983Barred spiral16 million ly
apart
NGC 5525Lenticular19 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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