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Uncommon exoplanet 32 EP

Kepler-102 c

RA 281.4825° · Dec 47.2078° · exoplanet

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Score breakdown

· 4 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Richly packed system +14
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Found by Kepler +3
Total score 32

2 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Tidally locked · +10
  • Richly packed system · +14
  • Found by Kepler · +3

Trivia

Hard to believe

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

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 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 12.1 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
52
diameter km
7232.7654
discovery facility
Kepler
discovery method
Transit
discovery year
2014
dist ly
351.5831
eccentricity
0.094
eq temp k
777
host star teff
4909
inclination
89.82
insolation
61
mag
12.072
mass earth
1.7
name
Kepler-102 c
orbital period days
7.0714
radius earth
0.567
semi major au
0.067
sys num planets
5
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Kepler-102 c

Kepler-102 c is an uncommon exoplanet. It lies about 351.6 light-years from Earth, shines at apparent magnitude 12.07, has an equilibrium temperature near 777 K and spans roughly 0.57 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 12.07, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-102 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-102 c is an uncommon exoplanet

Kepler-102 c scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Tidally locked, Richly packed system and Found by Kepler — 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.