Common exoplanet 17 EP

HD 117207 b

RA 202.3369° · Dec -35.5713° · exoplanet

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Score breakdown

· 3 badges

17 pts · Common

Common 24 pts → Uncommon

Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 17

7 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 1.9 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 164.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1055 years in a starship at a tenth of light speed.
Distance. 106 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1920.

Saying hello

Say hello. A radio message and its reply would take 211 years round-trip.

Standing on it

A year here. A full year lasts about 7.2 Earth years.

By the numbers

Size. About 13.4× the width of Earth.
Volume. About 2406 Earths could fit inside it.
Mass. Roughly 669× Earth's mass — about 2.1 Jupiters.
Your weight. You'd weigh about 3.7× your Earth weight standing here.
Temperature. A frigid -126°C — colder than dry ice.

How we found it

Discovery. Found by W. M. Keck Observatory using the radial velocity method.

Properties

density gcc: 1.53
discovery facility: W. M. Keck Observatory
discovery method: Radial Velocity
dist ly: 105.5268
eccentricity: 0.157
eq temp k: 147.2
insolation: 0.0811
mass earth: 669.3466
name: HD 117207 b
orbital period days: 2621.75
radius earth: 13.4
sys num planets: 1

About HD 117207 b

HD 117207 b is a common exoplanet. It lies about 105.5 light-years from Earth, has an equilibrium temperature near 147 K, spans roughly 13.4 Earth radii and weighs about 669.35 Earth masses.

A deep-frozen world far from its star's warmth.

How to see it

Like any astronomical target, HD 117207 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 117207 b is a common exoplanet

HD 117207 b scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Frozen world — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.