Rare exoplanet 45 EP

KELT-8 b

RA 283.3054° · Dec 24.1272° · exoplanet

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Score breakdown

· 5 badges

45 pts · Rare

Rare 46 pts → Epic

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

Total score 45

1 more point to reach Epic.

Badges

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

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. ≈ 11.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 6444 years in a starship at a tenth of light speed.
Distance. 644 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1382.

Saying hello

Say hello. A radio message and its reply would take 1289 years round-trip.

Standing on it

A year here. A full year lasts just 3.2 Earth days.

By the numbers

Size. About 18.2× the width of Earth.
Volume. About 5988 Earths could fit inside it.
Mass. Roughly 210× Earth's mass — about 0.7 Jupiters.
Your weight. You'd weigh about 0.6× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1402°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by KELT using the transit method.

Properties

density gcc: 0.167
discovery facility: KELT
discovery method: Transit
dist ly: 644.3929
eccentricity: 0.04
eq temp k: 1675
insolation: 983.3098
mass earth: 209.7678
name: KELT-8 b
orbital period days: 3.2441
radius earth: 18.1586
sys num planets: 1

About KELT-8 b

KELT-8 b is a rare exoplanet. It lies about 644.4 light-years from Earth, has an equilibrium temperature near 1,675 K, spans roughly 18.16 Earth radii and weighs about 209.77 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, KELT-8 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 KELT-8 b is a rare exoplanet

KELT-8 b scores 45 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 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world and Puffy low-density world — 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.