Rare exoplanet 36 EP

Kepler-186 d

RA 298.6527° · Dec 43.9550° · exoplanet

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Score breakdown

· 5 badges

36 pts · Rare

Rare 46 pts → Epic

Richly packed system +14
Super-Earth +8
Multi-planet system +6
Confirmed exoplanet +5
Found by Kepler +3

Total score 36

10 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Super-Earth · +8
Multi-planet system · +6
Richly packed system · +14
Found by Kepler · +3

Trivia

What makes it special

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. ≈ 10.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 904.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5792 years in a starship at a tenth of light speed.
Distance. 579 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1447.

Saying hello

Say hello. A radio message and its reply would take 1158 years round-trip.

Standing on it

A year here. A full year lasts just 13.3 Earth days.

By the numbers

Size. About 1.4× the width of Earth.
Mass. About 2.5× the mass of Earth.
Your weight. You'd weigh about 1.3× your Earth weight standing here.
Temperature. A scorching 106°C on average.

How we found it

Discovery. Found by Kepler using the transit method.

Cosmic context

Crowded system. One of at least 5 planets orbiting its star.

Properties

density gcc: 5.09
discovery facility: Kepler
discovery method: Transit
dist ly: 579.2335
eccentricity: 0
eq temp k: 379
insolation: 7.204
mass earth: 2.54
name: Kepler-186 d
orbital period days: 13.343
radius earth: 1.4
sys num planets: 5

About Kepler-186 d

Kepler-186 d is a rare exoplanet. It lies about 579.2 light-years from Earth, has an equilibrium temperature near 379 K, spans roughly 1.4 Earth radii and weighs about 2.54 Earth masses.

Crammed into a system of five or more planets.

How to see it

Like any astronomical target, Kepler-186 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 Kepler-186 d is a rare exoplanet

Kepler-186 d scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 10 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Super-Earth, Multi-planet system, Richly packed system and Found by Kepler — 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.