Epic exoplanet 61 EP

HD 219134 h

RA 348.3372° · Dec 57.1696° · exoplanet

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Score breakdown

· 7 badges

61 pts · Epic

Epic 68 pts → Anomaly

Richly packed system +14
Puffy low-density world +12
Nearby (<25 ly) +12
Frozen world +8
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 61

7 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Puffy low-density world · +12
Multi-planet system · +6
Richly packed system · +14
Nearby (<25 ly) · +12

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.
Cotton-candy planet. So low-density it would float on water.
Packed system. Crammed into a system of five or more planets.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 374.3 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 33.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 213 years in a starship at a tenth of light speed.
Distance. 21.3 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 2005.

Saying hello

Say hello. A radio message and its reply would take 42.6 years round-trip.

Standing on it

A year here. A full year lasts about 6.2 Earth years.

By the numbers

Size. About 12.7× the width of Earth.
Volume. About 2048 Earths could fit inside it.
Mass. Roughly 108× Earth's mass — about 0.3 Jupiters.
Your weight. You'd weigh about 0.7× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A frigid -155°C — colder than dry ice.

How we found it

Discovery. Found by Roque de los Muchachos Observatory using the radial velocity method.

Cosmic context

Crowded system. One of at least 6 planets orbiting its star.

Properties

density gcc: 0.29
discovery facility: Roque de los Muchachos Observatory
discovery method: Radial Velocity
dist ly: 21.3021
eccentricity: 0.06
eq temp k: 117.88
insolation: 0.0321
mass earth: 108.0622
name: HD 219134 h
orbital period days: 2247
radius earth: 12.7
sys num planets: 6

About HD 219134 h

HD 219134 h is an epic exoplanet. It lies about 21.3 light-years from Earth, has an equilibrium temperature near 118 K, spans roughly 12.7 Earth radii and weighs about 108.06 Earth masses.

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

How to see it

Like any astronomical target, HD 219134 h 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 219134 h is an epic exoplanet

HD 219134 h scores 61 points on Spacedle's rarity scale, which places it in the epic tier. Another 7 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Frozen world, Puffy low-density world, Multi-planet system, Richly packed system and Nearby (<25 ly) — 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.