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Rare exoplanet 48 EP

Kepler-186 f

RA 298.6527° · Dec 43.9550° · exoplanet

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Score breakdown

· 5 badges
48 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Richly packed system +14
  • Disputed — it may not be there at all +10
  • Confirmed exoplanet +5
  • Found by Kepler +3
Total score 48

2 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Richly packed system · +14
  • Found by Kepler · +3
  • Disputed — it may not be there at all · +10

Trivia

What makes it special

  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • Crowded system. One of at least 5 planets orbiting its star.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 15.1 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

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

Properties

controversial
yes
density gcc
5.87
diameter km
14924.754
discovery facility
Kepler
discovery method
Transit
discovery year
2014
dist ly
579.2335
eccentricity
0.04
eq temp k
177
host star teff
3755
inclination
89.96
insolation
0.3
mag
15.138
mass earth
1.71
name
Kepler-186 f
orbital period days
129.9441
radius earth
1.17
semi major au
0.432
spect
M1
sys num planets
5
sys num stars
1

About Kepler-186 f

Kepler-186 f is a rare exoplanet. It lies about 579.2 light-years from Earth, shines at apparent magnitude 15.14, has spectral type M1 and has an equilibrium temperature near 177 K.

Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

How to see it

At apparent magnitude 15.14, it takes a larger telescope or a long-exposure image to capture.

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

Kepler-186 f scores 48 points on Spacedle's rarity scale, which places it in the rare tier. Another 2 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Earth-sized, Richly packed system, Found by Kepler and Disputed — it may not be there at all — 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.