Epic exoplanet 54 EP

K2-312 c

RA 140.3391° · Dec 14.3679° · exoplanet

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Score breakdown

· 5 badges

54 pts · Epic

Epic 68 pts → Anomaly

In the habitable zone +30
Eccentric orbit +9
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 54

14 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Gas giant · +4
Eccentric orbit · +9
Multi-planet system · +6

Trivia

What makes it special

Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 6.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 559.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 3583 years in a starship at a tenth of light speed.
Distance. 358 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1668.

Saying hello

Say hello. A radio message and its reply would take 717 years round-trip.

Standing on it

A year here. A full year lasts about 2.5 Earth years.

By the numbers

Size. About 12.8× the width of Earth.
Volume. About 2097 Earths could fit inside it.
Mass. Roughly 1719× Earth's mass — about 5.4 Jupiters.
Your weight. You'd weigh about 10.5× your Earth weight standing here.
Temperature. A frigid -46°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 2 planets orbiting its star.
Wild orbit. Its highly elliptical path swings between scorching and frozen each lap.

Properties

density gcc: 4.51
discovery facility: Roque de los Muchachos Observatory
discovery method: Radial Velocity
dist ly: 358.315
eccentricity: 0.853
eq temp k: 226.65
habitable zone: yes
insolation: 0.4519
mass earth: 1719.4517
name: K2-312 c
orbital period days: 921.2
radius earth: 12.8
sys num planets: 2

About K2-312 c

K2-312 c is an epic exoplanet. It lies about 358.3 light-years from Earth, has an equilibrium temperature near 227 K, spans roughly 12.8 Earth radii and weighs about 1,719.45 Earth masses.

Sits where it's neither too hot nor too cold — liquid water could exist.

How to see it

Like any astronomical target, K2-312 c 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 K2-312 c is an epic exoplanet

K2-312 c 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 5 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Eccentric orbit and Multi-planet system — 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.