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Epic exoplanet 56 EP

Kepler-99 b

RA 297.3540° · Dec 41.3000° · exoplanet

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Score breakdown

· 6 badges
56 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Two suns in its sky +12
  • Tidally locked +10
  • Super-Earth +8
  • Confirmed exoplanet +5
  • Found by Kepler +3
Total score 56

22 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Tidally locked · +10
  • Denser than iron · +18
  • Found by Kepler · +3
  • Two suns in its sky · +12

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.

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 13.2 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.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
10.9
diameter km
18879.176
discovery facility
Kepler
discovery method
Transit
discovery year
2014
dist ly
679.608
eccentricity
0
eq temp k
810
host star teff
4782
inclination
89.05
insolation
108.042
mag
13.206
mass earth
6.15
multi star system
yes
name
Kepler-99 b
orbital period days
4.6036
radius earth
1.48
semi major au
0.0507
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About Kepler-99 b

Kepler-99 b is an epic exoplanet. It lies about 679.6 light-years from Earth, shines at apparent magnitude 13.21, has an equilibrium temperature near 810 K and spans roughly 1.48 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 13.21, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-99 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-99 b is an epic exoplanet

Kepler-99 b scores 56 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Super-Earth, Tidally locked, Denser than iron, 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.