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Epic exoplanet 55 EP

K2-183 b

RA 125.0072° · Dec 14.0195° · exoplanet

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Score breakdown

· 6 badges
55 pts · Epic
Epic 78 pts → Anomaly
  • Earth-sized +16
  • Ultra-short period +14
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 55

23 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Earth-sized · +16
  • Ultra-short period · +14
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

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.

Hard to believe

  • A year in a day. Its entire year is over in 11.3 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 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 12.9 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.

Properties

density gcc
5.66
diameter km
14031.82
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
1073.187
host star teff
5482
inclination
90.1
mag
12.867
mass earth
1.37
name
K2-183 b
orbital period days
0.4693
radius earth
1.1
sys num planets
3
sys num stars
1

Nearby objects

About K2-183 b

K2-183 b is an epic exoplanet. It lies about 1,073.2 light-years from Earth, shines at apparent magnitude 12.87, spans roughly 1.1 Earth radii and weighs about 1.37 Earth masses.

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 12.87, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-183 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 K2-183 b is an epic exoplanet

K2-183 b scores 55 points on Spacedle's rarity scale, which places it in the epic tier. Another 23 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Earth-sized, Ultra-short period, 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.