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Epic exoplanet 55 EP

WASP-100 b

RA 68.9598° · Dec -64.0270° · exoplanet

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Score breakdown

· 7 badges
55 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Two suns in its sky +12
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Blasted by starlight +4
Total score 55

23 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Blasted by starlight · +4
  • Two suns in its sky · +12

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 10.8 you'll want a small backyard telescope.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Properties

density gcc
0.53
diameter km
190169.0469
discovery facility
SuperWASP
discovery method
Transit
discovery year
2014
dist ly
1188.5483
eccentricity
0
eq temp k
2099
host star teff
6900
inclination
82.6
insolation
5502.8822
mag
10.798
mass earth
400.4658
multi star system
yes
name
WASP-100 b
orbital period days
2.8494
radius earth
14.908
semi major au
0.0457
spect
F2
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About WASP-100 b

WASP-100 b is an epic exoplanet. It lies about 1,188.5 light-years from Earth, shines at apparent magnitude 10.8, has spectral type F2 and has an equilibrium temperature near 2,099 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 10.8, a small backyard telescope will bring it into view.

Like any astronomical target, WASP-100 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-100 b is an epic exoplanet

WASP-100 b scores 55 points on Spacedle's rarity scale, which places it in the epic tier. Another 23 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Lava world, Tidally locked, Blasted by starlight 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.