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Rare exoplanet 39 EP

K2-279 b

RA 204.7793° · Dec -6.0418° · exoplanet

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Score breakdown

· 4 badges
39 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Tidally locked · +10
  • 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 11.5 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around April — that's when to go looking.

Could we get there?

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

Properties

density gcc
5.96
diameter km
15435.002
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
596.81
eq temp k
879
host star teff
5558
insolation
139.1055
mag
11.491
mass earth
1.92
name
K2-279 b
orbital period days
7.1226
radius earth
1.21
semi major au
0.067
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-279 b

K2-279 b is a rare exoplanet. It lies about 596.8 light-years from Earth, shines at apparent magnitude 11.49, has an equilibrium temperature near 879 K and spans roughly 1.21 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 11.49, a small backyard telescope will bring it into view.

Like any astronomical target, K2-279 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 K2-279 b is a rare exoplanet

K2-279 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Earth-sized, Tidally locked 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.