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Rare exoplanet 36 EP

KOI-94 d

RA 297.3331° · Dec 41.8911° · exoplanet

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Score breakdown

· 6 badges
36 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by Kepler +3
Total score 36

14 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +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 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 12.3 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
0.363
diameter km
143762.374
discovery facility
Kepler
discovery method
Transit
discovery year
2013
dist ly
1555.9337
eccentricity
0.022
eq temp k
806
host star teff
6182
inclination
89.871
insolation
97.12
mag
12.314
mass earth
106
multi star system
yes
name
KOI-94 d
orbital period days
22.343
radius earth
11.27
semi major au
0.1684
sys num planets
4
sys num stars
2

About KOI-94 d

KOI-94 d is a rare exoplanet. It lies about 1,555.9 light-years from Earth, shines at apparent magnitude 12.31, has an equilibrium temperature near 806 K and spans roughly 11.27 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 12.31, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, KOI-94 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 KOI-94 d is a rare exoplanet

KOI-94 d scores 36 points on Spacedle's rarity scale, which places it in the rare tier. Another 14 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, 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.