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Rare exoplanet 37 EP

WASP-136 b

RA 0.3258° · Dec -8.9263° · exoplanet

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Score breakdown

· 5 badges
37 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 37

13 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4

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.

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 10 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around September — that's when to go looking.

Properties

density gcc
0.5835
diameter km
214475.9994
discovery facility
SuperWASP
discovery method
Transit
discovery year
2016
dist ly
898.8435
eccentricity
0
eq temp k
1630
host star teff
6250
inclination
87.7
insolation
1843.4633
mag
9.974
mass earth
479.9209
name
WASP-136 b
orbital period days
5.2154
radius earth
16.8135
semi major au
0.0661
spect
F
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About WASP-136 b

WASP-136 b is a rare exoplanet. It lies about 898.8 light-years from Earth, shines at apparent magnitude 9.97, has spectral type F and has an equilibrium temperature near 1,630 K.

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

How to see it

At apparent magnitude 9.97, a small backyard telescope will bring it into view.

Like any astronomical target, WASP-136 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 WASP-136 b is a rare exoplanet

WASP-136 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Lava world, Tidally locked and Blasted by starlight — 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.