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Rare exoplanet 49 EP

Kepler-155 c

RA 288.4958° · Dec 51.0819° · exoplanet

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Score breakdown

· 5 badges
49 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by Kepler +3
Total score 49

1 more point to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Found by Kepler · +3

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • 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 14.7 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.

Properties

density gcc
2.76
diameter km
28573.888
discovery facility
Kepler
discovery method
Transit
discovery year
2014
dist ly
957.2646
eccentricity
0
eq temp k
286
habitable zone
yes
host star teff
4508
inclination
89.495
insolation
1.28
mag
14.654
mass earth
5.65
name
Kepler-155 c
orbital period days
52.6618
radius earth
2.24
semi major au
0.242
spect
M0 V
sys num planets
2
sys num stars
1

About Kepler-155 c

Kepler-155 c is a rare exoplanet. It lies about 957.3 light-years from Earth, shines at apparent magnitude 14.65, has spectral type M0 V and has an equilibrium temperature near 286 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 14.65, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-155 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-155 c is a rare exoplanet

Kepler-155 c scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Sub-Neptune, Multi-planet 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.