← Back to dex
Rare exoplanet 40 EP

Kepler-82 c

RA 292.8734° · Dec 42.9662° · exoplanet

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 6 badges
40 pts · Rare
Rare 50 pts → Epic
  • Richly packed system +14
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Neptune-like +4
  • Found by Kepler +3
Total score 40

10 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Neptune-like · +4
  • Richly packed system · +14
  • Found by Kepler · +3
  • Orbits a Sun-like star · +8

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • Crowded system. One of at least 5 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 15.1 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 July — that's when to go looking.

Properties

density gcc
0.494
diameter km
68118.108
discovery facility
Kepler
discovery method
Transit
discovery year
2012
dist ly
2949.5135
eccentricity
0.007
eq temp k
450
host star teff
5401
inclination
90.15
insolation
8.035
mag
15.131
mass earth
13.9
name
Kepler-82 c
orbital period days
51.54
radius earth
5.34
semi major au
0.2626
sys num planets
5
sys num stars
1

About Kepler-82 c

Kepler-82 c is a rare exoplanet. It lies about 2,949.5 light-years from Earth, shines at apparent magnitude 15.13, has an equilibrium temperature near 450 K and spans roughly 5.34 Earth radii.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 15.13, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-82 c 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 Kepler-82 c is a rare exoplanet

Kepler-82 c scores 40 points on Spacedle's rarity scale, which places it in the rare tier. Another 10 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Neptune-like, Richly packed system, Found by Kepler 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.