What it’s like to stand here
K2-39 b
weight
0.73 g
sun
51.0× wider
sky
amber-orange

Illustration computed from this world’s measured and derived values, not a photograph.

Ice / gas giant

K2-39 b

Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.

K2-39
host star
6.28 R⊕
radius
28.60 M⊕
mass · measured
4.6 days
orbital period
1397°C (2546°F)
avg temp
What it's like to stand here
0.73 g
surface gravity (no solid surface · measured mass)
4.6 days
one year, in Earth time
51.0× wider
how big its sun looks vs ours
amber-orange
midday sky tint
1.4×
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 · 1,003 ly away
Jet airliner
1.2 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
1.6 million years
dies en route1000-yr cryo: fails
Light speed
1,003 years
dies en route1000-yr cryo: fails
Warp 10
1 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthK2-39 b is 6.3× the width of Earth
Explore from here · roam the neighborhood
Host star
K2-39
4881 K host star · 1 planet
Explore →
Sibling worlds in this system

No other confirmed planets here yet. New ones auto-appear as telescopes report.

Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.

Can you see it tonight? · observe
SMALL TELESCOPE NEEDED
Host-star brightnessmag 10.8
ConstellationAquarius
To see the host star4-6" (100-150 mm) telescope
Gear bridge

Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.

Illustration generated from K2-39 b's confirmed parameters, not a photograph.