What it’s like to stand here
Kepler-398 d
weight
≈ 0.79 g
sun
10.8× wider
sky
amber-orange

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

Rocky world

Kepler-398 d

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

Kepler-398
host star
0.88 R⊕
radius
0.61 M⊕
mass · estimated from radius
6.8 days
orbital period
363°C (685°F)
avg temp
What it's like to stand here
≈ 0.79 g
your weight (mass estimated from size)
6.8 days
one year, in Earth time
10.8× wider
how big its sun looks vs ours
amber-orange
midday sky tint
1.3×
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 · 578 ly away
Jet airliner
694 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
902,162 years
dies en route1000-yr cryo: fails
Light speed
578 years
dies en route1000-yr cryo: survives
Warp 10
211 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthKepler-398 d is 1.1× narrower than Earth
Explore from here · roam the neighborhood
Host star
Kepler-398
4557 K host star · 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
MID-SIZE TELESCOPE NEEDED
Host-star brightnessmag 13.5
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-398 d's confirmed parameters, not a photograph.