What it’s like to stand here
HAT-P-15 b
weight
4.37 g
sun
11.1× wider
sky
warm white

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

Gas giant

HAT-P-15 b

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

HAT-P-15
host star
11.88 R⊕
radius
617 M⊕
mass · measured
11 days
orbital period
631°C (1168°F)
avg temp
What it's like to stand here
4.37 g
surface gravity (no solid surface · measured mass)
11 days
one year, in Earth time
11.1× wider
how big its sun looks vs ours
warm white
midday sky tint
0.2×
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 · 628 ly away
Jet airliner
753 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
979,282 years
dies en route1000-yr cryo: fails
Light speed
628 years
dies en route1000-yr cryo: survives
Warp 10
229 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
EarthHAT-P-15 b is 12× the width of Earth
Explore from here · roam the neighborhood
Host star
HAT-P-15
G5 · 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
SMALL TELESCOPE NEEDED
Host-star brightnessmag 12.4
ConstellationPerseus
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 HAT-P-15 b's confirmed parameters, not a photograph.