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Epic exoplanet 69 EP

K2-141 b

RA 350.9170° · Dec -1.1892° · exoplanet

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Score breakdown

· 7 badges
69 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Ultra-short period +14
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
Total score 69

9 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Ultra-short period · +14
  • Denser than iron · +18
  • Multi-planet system · +6
  • Blasted by starlight · +4

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.
  • A year in a day. Its entire year is over in 6.7 hours. Birthdays here would come round faster than meals.

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. 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 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 11.5 you'll want a small backyard telescope.

Properties

density gcc
7.93
diameter km
19261.862
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
201.8045
eccentricity
0
eq temp k
2103
host star teff
4570
inclination
86.3
insolation
3260
mag
11.454
mass earth
4.97
name
K2-141 b
orbital period days
0.2803
radius earth
1.51
semi major au
0.0075
spect
K7 V
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-141 b

K2-141 b is an epic exoplanet. It lies about 201.8 light-years from Earth, shines at apparent magnitude 11.45, has spectral type K7 V and has an equilibrium temperature near 2,103 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 11.45, a small backyard telescope will bring it into view.

Like any astronomical target, K2-141 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 K2-141 b is an epic exoplanet

K2-141 b scores 69 points on Spacedle's rarity scale, which places it in the epic tier. Another 9 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Super-Earth, Lava world, Ultra-short period, Denser than iron, Multi-planet system and Blasted by starlight — 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.