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Uncommon exoplanet 30 EP

Kepler-25 c

RA 286.6384° · Dec 39.4879° · exoplanet

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Score breakdown

· 5 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Two suns in its sky +12
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Neptune-like +4
  • Found by Kepler +3
Total score 30

4 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • Multi-planet system · +6
  • Found by Kepler · +3
  • Two suns in its sky · +12

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 3 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 10.8 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
0.588
diameter km
66549.0954
discovery facility
Kepler
discovery method
Transit
discovery year
2011
dist ly
793.3712
eccentricity
0.0061
eq temp k
934
host star teff
6354
inclination
92.764
insolation
210.172
mag
10.769
mass earth
15.2
multi star system
yes
name
Kepler-25 c
orbital period days
12.7207
radius earth
5.217
semi major au
0.1117
spect
F8
sys num planets
3
sys num stars
2

About Kepler-25 c

Kepler-25 c is an uncommon exoplanet. It lies about 793.4 light-years from Earth, shines at apparent magnitude 10.77, has spectral type F8 and has an equilibrium temperature near 934 K.

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 10.77, a small backyard telescope will bring it into view.

Like any astronomical target, Kepler-25 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-25 c is an uncommon exoplanet

Kepler-25 c scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Neptune-like, Multi-planet system, Found by Kepler and Two suns in its sky — 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.