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Rare exoplanet 37 EP

K2-111 b

RA 59.8903° · Dec 21.2985° · exoplanet

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Score breakdown

· 5 badges
37 pts · Rare
Rare 50 pts → Epic
  • Tidally locked +10
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 37

13 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Tidally locked · +10
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

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 2 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
5.0654
diameter km
23433.1394
discovery facility
K2
discovery method
Transit
discovery year
2017
dist ly
653.5971
eccentricity
0.134
eq temp k
1293
host star teff
5775
inclination
86.34
insolation
490
mag
11.13
mass earth
5.35
name
K2-111 b
orbital period days
5.3519
radius earth
1.837
semi major au
0.0565
spect
G2
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-111 b

K2-111 b is a rare exoplanet. It lies about 653.6 light-years from Earth, shines at apparent magnitude 11.13, has spectral type G2 and has an equilibrium temperature near 1,293 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 11.13, a small backyard telescope will bring it into view.

Like any astronomical target, K2-111 b 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 K2-111 b is a rare exoplanet

K2-111 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Super-Earth, Tidally locked, Multi-planet system and Orbits a Sun-like star — 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.