Epic exoplanet 53 EP

KELT-20 b

RA 294.6614° · Dec 31.2192° · exoplanet

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Score breakdown

· 5 badges

53 pts · Epic

Epic 68 pts → Anomaly

Ultra-hot Jupiter +26
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
Ultra-hot Jupiter · +26
Blasted by starlight · +8

Trivia

What makes it special

Ultra-hot Jupiter. So hot that iron vaporises and rains back down as molten metal.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 7.8 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 694.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 4450 years in a starship at a tenth of light speed.
Distance. 445 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1581.

Saying hello

Say hello. A radio message and its reply would take 890 years round-trip.

Standing on it

A year here. A full year lasts just 3.5 Earth days.

By the numbers

Size. About 19.5× the width of Earth.
Volume. About 7432 Earths could fit inside it.
Mass. Roughly 1075× Earth's mass — about 3.4 Jupiters.
Your weight. You'd weigh about 2.8× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 2262 K — hot enough to vaporise iron.

How we found it

Discovery. Found by KELT-North using the transit method.

Properties

density gcc: 0.806
discovery facility: KELT-North
discovery method: Transit
dist ly: 444.9616
eccentricity: 0
eq temp k: 2262
insolation: 4362.5
mass earth: 1074.9011
name: KELT-20 b
orbital period days: 3.4741
radius earth: 19.5149
sys num planets: 1

About KELT-20 b

KELT-20 b is an epic exoplanet. It lies about 445 light-years from Earth, has an equilibrium temperature near 2,262 K, spans roughly 19.51 Earth radii and weighs about 1,074.9 Earth masses.

So hot that iron vaporises and rains back down as molten metal.

How to see it

Like any astronomical target, KELT-20 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-20 b is an epic exoplanet

KELT-20 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 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Ultra-hot Jupiter 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.