Epic exoplanet 53 EP

MASCARA-4 b

RA 147.5801° · Dec -66.1139° · 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. ≈ 9.8 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 869.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5567 years in a starship at a tenth of light speed.
Distance. 557 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1469.

Saying hello

Say hello. A radio message and its reply would take 1113 years round-trip.

Standing on it

A year here. A full year lasts just 2.8 Earth days.

By the numbers

Size. About 17× the width of Earth.
Volume. About 4897 Earths could fit inside it.
Mass. Roughly 532× Earth's mass — about 1.7 Jupiters.
Your weight. You'd weigh about 1.8× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 2250 K — hot enough to vaporise iron.

How we found it

Discovery. Found by Multiple Observatories using the transit method.

Properties

density gcc: 0.481
discovery facility: Multiple Observatories
discovery method: Transit
dist ly: 556.7352
eccentricity: 0
eq temp k: 2250
insolation: 4913.69
mass earth: 532.3626
name: MASCARA-4 b
orbital period days: 2.8241
radius earth: 16.9816
sys num planets: 1

About MASCARA-4 b

MASCARA-4 b is an epic exoplanet. It lies about 556.7 light-years from Earth, has an equilibrium temperature near 2,250 K, spans roughly 16.98 Earth radii and weighs about 532.36 Earth masses.

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

How to see it

Like any astronomical target, MASCARA-4 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 MASCARA-4 b is an epic exoplanet

MASCARA-4 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.