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Rare exoplanet 46 EP

Kepler-1229 b

RA 297.4868° · Dec 46.9967° · exoplanet

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Score breakdown

· 4 badges
46 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Super-Earth +8
  • Confirmed exoplanet +5
  • Found by Kepler +3
Total score 46

4 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Super-Earth · +8
  • 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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • 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.

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 16.1 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
5.09
diameter km
17858.68
discovery facility
Kepler
discovery method
Transit
discovery year
2016
dist ly
865.8855
eccentricity
0
eq temp k
212
habitable zone
yes
host star teff
3784
inclination
89.9971
insolation
0.524
mag
16.124
mass earth
2.54
name
Kepler-1229 b
orbital period days
86.829
radius earth
1.4
semi major au
0.3006
sys num planets
1
sys num stars
1

About Kepler-1229 b

Kepler-1229 b is a rare exoplanet. It lies about 865.9 light-years from Earth, shines at apparent magnitude 16.12, has an equilibrium temperature near 212 K and spans roughly 1.4 Earth radii.

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 16.12, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-1229 b 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-1229 b is a rare exoplanet

Kepler-1229 b scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Super-Earth 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.