Epic exoplanet 57 EP

HD 202772 A b

RA 319.6996° · Dec -26.6164° · exoplanet

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Score breakdown

· 7 badges

57 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
Found by TESS +4

Total score 57

11 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
Found by TESS · +4

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. ≈ 9.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 822.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5267 years in a starship at a tenth of light speed.
Distance. 527 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1499.

Saying hello

Say hello. A radio message and its reply would take 1053 years round-trip.

Standing on it

A year here. A full year lasts just 3.3 Earth days.

By the numbers

Size. About 18.2× the width of Earth.
Volume. About 6065 Earths could fit inside it.
Mass. Roughly 324× Earth's mass — about 1 Jupiters.
Your weight. You'd weigh about 1.0× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 2181 K — hot enough to vaporise iron.

How we found it

Discovery. Found by Transiting Exoplanet Survey Satellite (TESS) using the transit method.

Properties

density gcc: 0.293
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 526.7354
eccentricity: 0.03
eq temp k: 2181
insolation: 3770
mass earth: 323.5493
name: HD 202772 A b
orbital period days: 3.3089
radius earth: 18.237
sys num planets: 1

About HD 202772 A b

HD 202772 A b is an epic exoplanet. It lies about 526.7 light-years from Earth, has an equilibrium temperature near 2,181 K, spans roughly 18.24 Earth radii and weighs about 323.55 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HD 202772 A 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 HD 202772 A b is an epic exoplanet

HD 202772 A b scores 57 points on Spacedle's rarity scale, which places it in the epic tier. Another 11 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Puffy low-density world, Blasted by starlight and Found by TESS — 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.