What it’s like to stand here
Kepler-139 f
weight
0.81 g
sky
warm white

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

Ice / gas giant

Kepler-139 f

1,275 lyDiscovered in 2025 by Multiple Observatories

Transit Timing Variations: inferred from the gravitational tug it puts on a sibling planet’s transit timing.

Kepler-139 →
host star
6.67 R⊕
radius
36.00 M⊕
mass · measured
355 days
orbital period
–
avg temp
What it's like to stand here
0.81 g
surface gravity (no solid surface · measured mass)
355 days
one year, in Earth time
–
sun size, needs orbit
warm white
midday sky tint
1.2×
how high you could jump vs Earth
–
rotation unknown
How long to get there · 1,275 ly away
Jet airliner
1.5 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
2.0 million years
dies en route1000-yr cryo: fails
Light speed
1,275 years
dies en route1000-yr cryo: fails
Warp 10
1 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthKepler-139 f is 6.7× the width of Earth
Explore from here · roam the neighborhood
Kepler-139 fIce / gas giant
PlanetKepler-139 dRocky world
PlanetKepler-139 bSub-Neptune
PlanetTOI-4940 bsimilar world
SystemKepler-12818 ly
Sky regionLyrathis direction
Host star
Kepler-139
5630 K host star · 5 planets
Explore →
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
Host-star brightnessmag 12.8
ConstellationLyra →
To see the host star8-10" (200-250 mm) telescope
Gear bridge

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

Illustration generated from Kepler-139 f's confirmed parameters, not a photograph.