What it’s like to stand here
KOI-1257 b
weight
4.15 g
sun
3.0× wider
sky
warm white

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

Gas giant

KOI-1257 b

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

KOI-1257
host star
10.54 R⊕
radius
461 M⊕
mass · measured
87 days
orbital period
238°C (460°F)
avg temp
What it's like to stand here
4.15 g
surface gravity (no solid surface · measured mass)
87 days
one year, in Earth time
3.0× wider
how big its sun looks vs ours
warm white
midday sky tint
0.2×
how high you could jump vs Earth
normal
day/night cycle (not tidally locked)
How long to get there · 2,140 ly away
Jet airliner
2.6 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
3.3 million years
dies en route1000-yr cryo: fails
Light speed
2,140 years
dies en route1000-yr cryo: fails
Warp 10
2 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthKOI-1257 b is 11× the width of Earth
Explore from here · roam the neighborhood
Host star
Binary system
KOI-1257
G5 V · 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
FAINT — LARGE TELESCOPE NEEDED
Host-star brightnessmag 14.8
ConstellationCygnus
To see the host star10"+ (250 mm) telescope, dark sky
Gear bridge

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

Illustration generated from KOI-1257 b's confirmed parameters, not a photograph.