What it’s like to stand here
K2-398 c
weight
≈ 0.88 g
sky
warm white

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

Ice / gas giant

K2-398 c

1,980 lyDiscovered in 2022 by K2

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

K2-398 →
host star
5.10 R⊕
radius
22.80 M⊕
mass · estimated from radius
19 days
orbital period
–
avg temp
What it's like to stand here
≈ 0.88 g
surface gravity (no solid surface · mass estimated from size)
19 days
one year, in Earth time
–
sun size, needs orbit
warm white
midday sky tint
1.1×
how high you could jump vs Earth
–
rotation unknown
How long to get there · 1,980 ly away
Jet airliner
2.4 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
3.1 million years
dies en route1000-yr cryo: fails
Light speed
1,980 years
dies en route1000-yr cryo: fails
Warp 10
2 years
arrives, just older
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthK2-398 c is 5.1× the width of Earth
Explore from here · roam the neighborhood
K2-398 cIce / gas giant
PlanetK2-398 bSub-Neptune
PlanetKIC 10525077 bsimilar world
SystemK2-402310 ly
Sky regionSextansthis direction
Host star
K2-398
G2 · 2 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 13.3
ConstellationSextans →
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 K2-398 c's confirmed parameters, not a photograph.