What it’s like to stand here
HD 81817 b
- weight
- 53.25 g
- sun
- 25.8× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
Gas giant
HD 81817 b
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
HD 81817 →
host star
12.00 R⊕
radius
7,669 M⊕
mass · measured
2.8 years
orbital period
743°C (1370°F)
avg temp
What it's like to stand here
53.25 g
surface gravity (no solid surface · measured mass)
2.8 years
one year, in Earth time
25.8× wider
how big its sun looks vs ours
amber-orange
midday sky tint
0.0×
how high you could jump vs Earth
normal
day/night cycle (not tidally locked)
How long to get there · 878 ly away
Jet airliner
1.1 billion years
dies en route1000-yr cryo: fails
Parker Solar Probethe fastest craft ever built
1.4 million years
dies en route1000-yr cryo: fails
Light speed
878 years
dies en route1000-yr cryo: survives
Warp 10
320 days
arrives thriving
Folding spacetime
instant
arrives thriving
Size vs Earth
Explore from here · roam the neighborhood
Host star
HD 81817
K3 III · 2 planets
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
VISIBLE TO THE NAKED EYE
Gear bridge
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
Illustration generated from HD 81817 b's confirmed parameters, not a photograph.