Epic exoplanet 53 EP

WASP-15 b

RA 208.9280° · Dec -32.1597° · exoplanet

Loading sky survey…

🌌 View in 3D star map

Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 6 badges

53 pts · Epic

Epic 68 pts → Anomaly

Lava world +14
Puffy low-density world +12
Hot Jupiter +10
Blasted by starlight +8
Confirmed exoplanet +5
Gas giant +4

Total score 53

15 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Puffy low-density world · +12
Blasted by starlight · +8

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.
Cotton-candy planet. So low-density it would float on water.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 16.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.4 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 9201 years in a starship at a tenth of light speed.
Distance. 920 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1106.

Saying hello

Say hello. A radio message and its reply would take 1840 years round-trip.

Standing on it

A year here. A full year lasts just 3.8 Earth days.

By the numbers

Size. About 15.8× the width of Earth.
Volume. About 3948 Earths could fit inside it.
Mass. Roughly 172× Earth's mass — about 0.5 Jupiters.
Your weight. You'd weigh about 0.7× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1403°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by SuperWASP using the transit method.

Properties

density gcc: 0.263
discovery facility: SuperWASP
discovery method: Transit
dist ly: 920.0567
eccentricity: 0
eq temp k: 1676
insolation: 1237.7366
mass earth: 171.6282
name: WASP-15 b
orbital period days: 3.7521
radius earth: 15.8047
sys num planets: 1

About WASP-15 b

WASP-15 b is an epic exoplanet. It lies about 920.1 light-years from Earth, has an equilibrium temperature near 1,676 K, spans roughly 15.8 Earth radii and weighs about 171.63 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, WASP-15 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-15 b is an epic exoplanet

WASP-15 b scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 15 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Puffy low-density world and Blasted by starlight — 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.