Epic exoplanet 54 EP

HD 181234 b

RA 289.9999° · Dec -9.3250° · exoplanet

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Score breakdown

· 6 badges

54 pts · Epic

Epic 68 pts → Anomaly

Denser than iron +18
Long-period world +10
Eccentric orbit +9
Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 54

14 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Long-period world · +10
Eccentric orbit · +9
Denser than iron · +18

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.
Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 2.7 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 243.2 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1557 years in a starship at a tenth of light speed.
Distance. 156 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1870.

Saying hello

Say hello. A radio message and its reply would take 311 years round-trip.

Standing on it

A year here. A full year lasts about 20.8 Earth years.

By the numbers

Size. About 12.5× the width of Earth.
Volume. About 1953 Earths could fit inside it.
Mass. Roughly 2981× Earth's mass — about 9.4 Jupiters.
Your weight. You'd weigh about 19.1× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A frigid -175°C — colder than dry ice.

How we found it

Discovery. Found by La Silla Observatory using the radial velocity method.

Properties

density gcc: 8.39
discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 155.7258
eccentricity: 0.726
eq temp k: 98.09
insolation: 0.0144
mass earth: 2980.9126
name: HD 181234 b
orbital period days: 7593.4051
radius earth: 12.5
sys num planets: 1

About HD 181234 b

HD 181234 b is an epic exoplanet. It lies about 155.7 light-years from Earth, has an equilibrium temperature near 98 K, spans roughly 12.5 Earth radii and weighs about 2,980.91 Earth masses.

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

How to see it

Like any astronomical target, HD 181234 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 181234 b is an epic exoplanet

HD 181234 b scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 14 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world, Eccentric orbit and Denser than iron — 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.