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Rare exoplanet 49 EP

WASP-47 c

RA 331.2031° · Dec -12.0191° · exoplanet

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Score breakdown

· 4 badges
49 pts · Rare
Rare 50 pts → Epic
  • In the habitable zone +30
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 49

1 more point to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

What it actually is

  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • 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.
  • Best time of year. It stands highest in the middle of the night around August — that's when to go looking.

Could we get there?

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

Properties

discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2015
dist ly
863.5959
eccentricity
0.264
eq temp k
247
habitable zone
yes
host star teff
5565
inclination
90
insolation
0.549
mag
11.936
mass earth
447
name
WASP-47 c
orbital period days
589.57
semi major au
1.393
spect
G9
sys num planets
4
sys num stars
1

About WASP-47 c

WASP-47 c is a rare 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 247 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 11.94, a small backyard telescope will bring it into view.

Like any astronomical target, WASP-47 c 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 c is a rare exoplanet

WASP-47 c scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, In the habitable zone, Multi-planet system 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.