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Uncommon exoplanet 29 EP

K2-336 b

RA 133.8382° · Dec 16.7941° · exoplanet

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Score breakdown

· 3 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Earth-sized +16
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
Total score 29

5 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • 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.

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.

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 12.8 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 February — that's when to go looking.

Could we get there?

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

Properties

density gcc
5.99
diameter km
15562.564
discovery facility
K2
discovery method
Transit
discovery year
2021
dist ly
780.4554
eq temp k
569
host star teff
5424
inclination
89.0304
mag
12.803
mass earth
1.98
name
K2-336 b
orbital period days
21.1947
radius earth
1.22
sys num planets
1
sys num stars
1

About K2-336 b

K2-336 b is an uncommon exoplanet. It lies about 780.5 light-years from Earth, shines at apparent magnitude 12.8, has an equilibrium temperature near 569 K and spans roughly 1.22 Earth radii.

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

Like any astronomical target, K2-336 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 K2-336 b is an uncommon exoplanet

K2-336 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Earth-sized 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.