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Uncommon exoplanet 23 EP

Kepler-100 e

RA 291.3861° · Dec 41.9901° · exoplanet

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Score breakdown

· 4 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 23

11 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • Multi-planet system · +6
  • 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 4 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 11.1 you'll want a small backyard telescope.
  • 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
0.906
diameter km
67225.174
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2023
dist ly
993.6179
eccentricity
0.0264
eq temp k
621.73
host star teff
5884
insolation
25.4128
mag
11.055
mass earth
24.1427
name
Kepler-100 e
orbital period days
60.8886
radius earth
5.27
semi major au
0.3124
sys num planets
4
sys num stars
1

About Kepler-100 e

Kepler-100 e is an uncommon exoplanet. It lies about 993.6 light-years from Earth, shines at apparent magnitude 11.05, has an equilibrium temperature near 622 K and spans roughly 5.27 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 11.05, a small backyard telescope will bring it into view.

Like any astronomical target, Kepler-100 e 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-100 e is an uncommon exoplanet

Kepler-100 e scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Neptune-like, 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.