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Uncommon exoplanet 31 EP

K2-136 d

RA 67.4129° · Dec 22.8826° · exoplanet

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Score breakdown

· 4 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Two suns in its sky +12
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 31

3 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Multi-planet system · +6
  • Two suns in its sky · +12

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 3 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 11.1 you'll want a small backyard telescope.
  • 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 November — that's when to go looking.

Could we get there?

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

Properties

density gcc
4.3
diameter km
19963.453
discovery facility
K2
discovery method
Transit
discovery year
2017
dist ly
193.2389
eccentricity
0.071
eq temp k
420
host star teff
4500
inclination
89.4
insolation
7.07
mag
11.101
mass earth
3
multi star system
yes
name
K2-136 d
orbital period days
25.575
radius earth
1.565
semi major au
0.1538
spect
K5.5
sys num planets
3
sys num stars
2

About K2-136 d

K2-136 d is an uncommon exoplanet. It lies about 193.2 light-years from Earth, shines at apparent magnitude 11.1, has spectral type K5.5 and has an equilibrium temperature near 420 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 11.1, a small backyard telescope will bring it into view.

Like any astronomical target, K2-136 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 K2-136 d is an uncommon exoplanet

K2-136 d scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Super-Earth, Multi-planet system and Two suns in its sky — 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.