Epic exoplanet 67 EP

K2-3 d

RA 172.3354° · Dec -1.4551° · exoplanet

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Score breakdown

· 5 badges

67 pts · Epic

Epic 68 pts → Anomaly

In the habitable zone +30
Denser than iron +18
Super-Earth +8
Multi-planet system +6
Confirmed exoplanet +5

Total score 67

1 more point to reach Anomaly.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Super-Earth · +8
Denser than iron · +18
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.
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. ≈ 2.5 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 224.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1437 years in a starship at a tenth of light speed.
Distance. 144 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1882.

Saying hello

Say hello. A radio message and its reply would take 287 years round-trip.

Standing on it

A year here. A full year lasts just 44.6 Earth days.

By the numbers

Size. About 1.5× the width of Earth.
Mass. About 2.2× the mass of Earth.
Your weight. You'd weigh about 1.0× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A surprisingly temperate 32°C average.

How we found it

Discovery. Found by K2 using the transit method.

Cosmic context

Crowded system. One of at least 3 planets orbiting its star.

Properties

density gcc: 17.5
discovery facility: K2
discovery method: Transit
dist ly: 143.7458
eccentricity: 0.091
eq temp k: 305.2
habitable zone: yes
insolation: 1.44
mass earth: 2.2
name: K2-3 d
orbital period days: 44.556
radius earth: 1.458
sys num planets: 3

About K2-3 d

K2-3 d is an epic exoplanet. It lies about 143.7 light-years from Earth, has an equilibrium temperature near 305 K, spans roughly 1.46 Earth radii and weighs about 2.2 Earth masses.

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

How to see it

Like any astronomical target, K2-3 d 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 K2-3 d is an epic exoplanet

K2-3 d scores 67 points on Spacedle's rarity scale, which places it in the epic tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Super-Earth, Denser than iron 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.