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Epic exoplanet 50 EP

Kepler-1520 b

RA 290.9662° · Dec 51.5048° · exoplanet

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Score breakdown

· 7 badges
50 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Ultra-short period +14
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Neptune-like +4
  • Blasted by starlight +4
  • Found by Kepler +3
Total score 50

28 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Neptune-like · +4
  • Lava world · +14
  • Ultra-short period · +14
  • Blasted by starlight · +4
  • Found by Kepler · +3

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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.
  • A year in a day. Its entire year is over in 15.7 hours. Birthdays here would come round faster than meals.

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.

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 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
0.804
diameter km
73603.274
discovery facility
Kepler
discovery method
Transit
discovery year
2016
dist ly
1982.7578
eccentricity
0
eq temp k
1437
host star teff
4677
inclination
50.98
insolation
1134.386
mag
16.002
mass earth
28.1
name
Kepler-1520 b
orbital period days
0.6536
radius earth
5.77
semi major au
0.0129
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Kepler-1520 b

Kepler-1520 b is an epic exoplanet. It lies about 1,982.8 light-years from Earth, shines at apparent magnitude 16, has an equilibrium temperature near 1,437 K and spans roughly 5.77 Earth radii.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 16, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Kepler-1520 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-1520 b is an epic exoplanet

Kepler-1520 b scores 50 points on Spacedle's rarity scale, which places it in the epic tier. Another 28 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Neptune-like, Lava world, Ultra-short period, Blasted by starlight 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.