Uncommon exoplanet 25 EP

WASP-47 b

RA 331.2031° · Dec -12.0191° · exoplanet

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Score breakdown

· 4 badges

25 pts · Uncommon

Uncommon 33 pts → Rare

Hot Jupiter +10
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 25

8 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Multi-planet system · +6

Trivia

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 4.2 Earth days.

By the numbers

Size. About 12.9× the width of Earth.
Volume. About 2127 Earths could fit inside it.
Mass. Roughly 374× Earth's mass — about 1.2 Jupiters.
Your weight. You'd weigh about 2.3× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1002°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by SuperWASP using the transit method.

Cosmic context

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

Properties

density gcc: 0.993
discovery facility: SuperWASP
discovery method: Transit
dist ly: 863.5959
eccentricity: 0.0006
eq temp k: 1275
insolation: 409
mass earth: 374
name: WASP-47 b
orbital period days: 4.1592
radius earth: 12.86
sys num planets: 4

About WASP-47 b

WASP-47 b is an uncommon exoplanet. It lies about 863.6 light-years from Earth, has an equilibrium temperature near 1,275 K, spans roughly 12.86 Earth radii and weighs about 374 Earth masses.

One of at least 4 planets orbiting its star.

How to see it

Like any astronomical target, WASP-47 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-47 b is an uncommon exoplanet

WASP-47 b scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter 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.