Uncommon exoplanet 27 EP

HD 115954 b

RA 199.9854° · Dec 38.3691° · exoplanet

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Score breakdown

· 4 badges

27 pts · Uncommon

Uncommon 33 pts → Rare

Long-period world +10
Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 27

6 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Long-period world · +10

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. ≈ 5 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 446.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 2859 years in a starship at a tenth of light speed.
Distance. 286 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1740.

Saying hello

Say hello. A radio message and its reply would take 572 years round-trip.

Standing on it

A year here. A full year lasts about 10.1 Earth years.

By the numbers

Size. About 12.6× the width of Earth.
Volume. About 2000 Earths could fit inside it.
Mass. Roughly 2686× Earth's mass — about 8.5 Jupiters.
Your weight. You'd weigh about 16.9× your Earth weight standing here.
Temperature. A frigid -128°C — colder than dry ice.

How we found it

Discovery. Found by Haute-Provence Observatory using the radial velocity method.

Properties

density gcc: 7.38
discovery facility: Haute-Provence Observatory
discovery method: Radial Velocity
dist ly: 285.8552
eccentricity: 0.487
eq temp k: 144.9
insolation: 0.064
mass earth: 2685.65
name: HD 115954 b
orbital period days: 3700
radius earth: 12.6
sys num planets: 1

About HD 115954 b

HD 115954 b is an uncommon exoplanet. It lies about 285.9 light-years from Earth, has an equilibrium temperature near 145 K, spans roughly 12.6 Earth radii and weighs about 2,685.65 Earth masses.

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

How to see it

Like any astronomical target, HD 115954 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 115954 b is an uncommon exoplanet

HD 115954 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Long-period 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.