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Epic exoplanet 59 EP

WASP-47 e

RA 331.2031° · Dec -12.0191° · exoplanet

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Score breakdown

· 7 badges
59 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Ultra-short period +14
  • Super-Earth +8
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Blasted by starlight +4
Total score 59

19 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Ultra-short period · +14
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Orbits a Sun-like star · +8

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

  • A year in a day. Its entire year is over in 19 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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • 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 11.9 you'll want a small backyard telescope.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.

Properties

density gcc
6.29
diameter km
23343.846
discovery facility
K2
discovery method
Transit
discovery year
2015
dist ly
863.5959
eccentricity
0
eq temp k
1992
host star teff
5565
inclination
86.73
insolation
3740
mag
11.936
mass earth
9
name
WASP-47 e
orbital period days
0.7896
radius earth
1.83
semi major au
0.0167
spect
G9
sys num planets
4
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About WASP-47 e

WASP-47 e is an epic exoplanet. It lies about 863.6 light-years from Earth, shines at apparent magnitude 11.94, has spectral type G9 and has an equilibrium temperature near 1,992 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 11.94, a small backyard telescope will bring it into view.

Like any astronomical target, WASP-47 e 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-47 e is an epic exoplanet

WASP-47 e scores 59 points on Spacedle's rarity scale, which places it in the epic tier. Another 19 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Super-Earth, Lava world, Ultra-short period, Multi-planet system, Blasted by starlight and Orbits a Sun-like star — 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.