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Rare exoplanet 37 EP

K2-83 b

RA 59.9014° · Dec 15.5588° · exoplanet

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Score breakdown

· 4 badges
37 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Tidally locked +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 37

13 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Tidally locked · +10
  • Multi-planet system · +6

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.
  • 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 14.5 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 November — that's when to go looking.

Properties

density gcc
5.94
diameter km
15868.7128
discovery facility
K2
discovery method
Transit
discovery year
2016
dist ly
409.4204
eccentricity
0.07
eq temp k
707.17
host star teff
3910
inclination
88.72
insolation
41.5
mag
14.522
mass earth
2.08
name
K2-83 b
orbital period days
2.747
radius earth
1.244
semi major au
0.0301
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-83 b

K2-83 b is a rare exoplanet. It lies about 409.4 light-years from Earth, shines at apparent magnitude 14.52, has an equilibrium temperature near 707 K and spans roughly 1.24 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 14.52, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-83 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 K2-83 b is a rare exoplanet

K2-83 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 4 science badges — Confirmed exoplanet, Earth-sized, Tidally locked and Multi-planet system — 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.