What it’s like to stand here
GJ 3138 c
weight
≥ 1.18 g
sun
8.8× wider
sky
deep orange

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

Sub-Neptune

GJ 3138 c

Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.

GJ 3138
host star
1.88 R⊕
radius
4.18 M⊕
mass · minimum (m·sin i)
6.0 days
orbital period
258°C (496°F)
avg temp
What it's like to stand here
≥ 1.18 g
your weight (minimum mass only)
6.0 days
one year, in Earth time
8.8× wider
how big its sun looks vs ours
deep orange
midday sky tint
0.8×
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 · 92.9 ly away
Jet airliner
111 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
144,826 years
dies en route1000-yr cryo: fails
Light speed
93 years
dies en route1000-yr cryo: survives
Warp 10
34 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthGJ 3138 c is 1.9× the width of Earth
Explore from here · roam the neighborhood
Host star
GJ 3138
M0 · 3 planets
Explore →

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
ConstellationCetus
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 GJ 3138 c's confirmed parameters, not a photograph.