Rare exoplanet 41 EP

WASP-47 c

RA 331.2031° · Dec -12.0191° · exoplanet

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Score breakdown

· 3 badges

41 pts · Rare

Rare 46 pts → Epic

In the habitable zone +30
Multi-planet system +6
Confirmed exoplanet +5

Total score 41

5 more points to reach Epic.

Badges

Confirmed exoplanet · +5
In the habitable zone · +30
Multi-planet system · +6

Trivia

What makes it special

Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 15.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.3 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 8636 years in a starship at a tenth of light speed.
Distance. 864 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1162.

Saying hello

Say hello. A radio message and its reply would take 1727 years round-trip.

Standing on it

A year here. A full year lasts just 590 Earth days.

By the numbers

Mass. Roughly 447× Earth's mass — about 1.4 Jupiters.
Temperature. A frigid -26°C — colder than dry ice.

How we found it

Discovery. Found by La Silla Observatory using the radial velocity method.

Cosmic context

Crowded system. One of at least 4 planets orbiting its star.

Properties

discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 863.5959
eccentricity: 0.264
eq temp k: 247
habitable zone: yes
insolation: 0.549
mass earth: 447
name: WASP-47 c
orbital period days: 589.57
sys num planets: 4

About WASP-47 c

WASP-47 c is a rare exoplanet. It lies about 863.6 light-years from Earth, has an equilibrium temperature near 247 K, weighs about 447 Earth masses and completes an orbit every 589.57 days.

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

How to see it

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 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, In the habitable zone and Multi-planet system — 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.