What it’s like to stand here
51 Peg b
weight
0.71 g
sun
22.2× wider
sky
warm white

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

Gas giant

51 Peg b

Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.

51 Peg
host star
14.30 R⊕
radius
146 M⊕
mass · measured
4.2 days
orbital period
1038°C (1901°F)
avg temp
What it's like to stand here
0.71 g
surface gravity (no solid surface · measured mass)
4.2 days
one year, in Earth time
22.2× wider
how big its sun looks vs ours
warm white
midday sky tint
1.4×
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 · 50.4 ly away
Jet airliner
60.5 million years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
78,648 years
dies en route1000-yr cryo: fails
Light speed
50 years
arrives elderly
Warp 10
18 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
Earth51 Peg b is 14× the width of Earth
Explore from here · roam the neighborhood
Host star
51 Peg
G5V · 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
VISIBLE TO THE NAKED EYE
Host-star brightnessmag 5.5
ConstellationPegasus
To see the host starno equipment needed
Gear bridge

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

Illustration generated from 51 Peg b's confirmed parameters, not a photograph.