What it’s like to stand here
TOI-1438 b
weight
1.02 g
sun
14.8× wider
sky
warm white

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

Sub-Neptune

TOI-1438 b

ESI 0.21360 lyDiscovered in 2025 by Transiting Exoplanet Survey Satellite (TESS)

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

TOI-1438 →
host star
3.04 R⊕
radius
9.40 M⊕
mass · measured
5.1 days
orbital period
698°C (1288°F)
avg temp
What it's like to stand here
1.02 g
your weight (measured mass)
5.1 days
one year, in Earth time
14.8× wider
how big its sun looks vs ours
warm white
midday sky tint
1.0×
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 · 360 ly away
Jet airliner
432 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
562,153 years
dies en route1000-yr cryo: fails
Light speed
360 years
dies en route1000-yr cryo: survives
Warp 10
132 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthTOI-1438 b is 3.0× the width of Earth
Explore from here · roam the neighborhood
TOI-1438 bSub-Neptune
PlanetTOI-1438 cSub-Neptune
PlanetTOI-220 bsimilar world
SystemHD 16117834 ly
Sky regionDracothis direction
Host star
TOI-1438
K0 V · 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
SMALL TELESCOPE NEEDED
Host-star brightnessmag 11.0
ConstellationDraco →
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 TOI-1438 b's confirmed parameters, not a photograph.