What it’s like to stand here
K2-21 c
- weight
- ≈ 1.09 g
- sun
- 6.0× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
Sub-Neptune
K2-21 c
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
K2-21 →
host star
2.49 R⊕
radius
6.76 M⊕
mass · estimated from radius
16 days
orbital period
147°C (296°F)
avg temp
What it's like to stand here
≈ 1.09 g
your weight (mass estimated from size)
16 days
one year, in Earth time
6.0× wider
how big its sun looks vs ours
amber-orange
midday sky tint
0.9×
how high you could jump vs Earth
likely
likely tidally locked: probably eternal day on one side, night on the other
How long to get there · 273 ly away
Jet airliner
327 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
425,481 years
dies en route1000-yr cryo: fails
Light speed
273 years
dies en route1000-yr cryo: survives
Warp 10
100 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
Explore from here · roam the neighborhood
Host star
K2-21
M0.0 · 2 planets
Sibling worlds in this system
Nearby star systems
Similar worlds (size · gravity · star)
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
Can you see it tonight? · observe
MID-SIZE TELESCOPE NEEDED
Gear bridge
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
Illustration generated from K2-21 c's confirmed parameters, not a photograph.