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Epic exoplanet 65 EP

Kepler-68 d

RA 291.0323° · Dec 49.0402° · exoplanet

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Score breakdown

· 6 badges
65 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Two suns in its sky +12
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 65

13 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Gas giant · +4
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8
  • Two suns in its sky · +12

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.

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

  • 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.
  • 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 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 10.1 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.

Properties

density gcc
0.546
diameter km
177311.18
discovery facility
W. M. Keck Observatory
discovery method
Radial Velocity
discovery year
2013
dist ly
470.2061
eccentricity
0.102
eq temp k
260.75
habitable zone
yes
host star teff
5847
insolation
0.7889
mag
10.077
mass earth
267
multi star system
yes
name
Kepler-68 d
orbital period days
632.62
radius earth
13.9
semi major au
1.469
sys num planets
4
sys num stars
2

About Kepler-68 d

Kepler-68 d is an epic exoplanet. It lies about 470.2 light-years from Earth, shines at apparent magnitude 10.08, has an equilibrium temperature near 261 K and spans roughly 13.9 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 10.08, a small backyard telescope will bring it into view.

Like any astronomical target, Kepler-68 d 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-68 d is an epic exoplanet

Kepler-68 d scores 65 points on Spacedle's rarity scale, which places it in the epic tier. Another 13 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, In the habitable zone, Gas giant, Multi-planet system, Orbits a Sun-like star 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.