F-type star · yellow-white star
Kepler-21
6305 K
temperature
1.90 R☉
radius
1.41 M☉
mass
5.188 L☉
luminosity
How long to get there · 354 ly away
At light speed, about 354 years to reach this system.
See the full survival timeline (jet to folding spacetime) →Size vs the Sun
How it compares with our Sun
1.09×
as hot as the Sun
1.90×
the Sun's width
1.41×
the Sun's mass
5.19×
the Sun's light output
Worlds orbiting this star
Explore from here · roam the neighborhood
Zoom out: system → (soon) galaxy arm, and the host black hole at the galaxy's heart.
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 8.3To see it 50 mm binoculars
Illustration generated from Kepler-21's temperature, not a photograph.