Anomaly exoplanet 71 EP

HD 20329 b

RA 49.1781° · Dec 15.6564° · exoplanet

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Score breakdown

· 7 badges

71 pts · Anomaly

Anomaly 95 pts → Mythic

Denser than iron +18
Lava world +14
Ultra-short period +14
Super-Earth +8
Blasted by starlight +8
Confirmed exoplanet +5
Found by TESS +4

Total score 71

24 more points to reach Mythic.

Badges

Confirmed exoplanet · +5
Super-Earth · +8
Lava world · +14
Ultra-short period · +14
Denser than iron · +18
Blasted by starlight · +8
Found by TESS · +4

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.
Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 3.6 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 324.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 2077 years in a starship at a tenth of light speed.
Distance. 208 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1818.

Saying hello

Say hello. A radio message and its reply would take 415 years round-trip.

Standing on it

A year here. A full year lasts just 0.9 Earth days.

By the numbers

Size. About 1.7× the width of Earth.
Volume. About 5.1 Earths could fit inside it.
Mass. About 7.4× the mass of Earth.
Your weight. You'd weigh about 2.5× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. Around 2141 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: 8.06
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 207.6948
eccentricity: 0
eq temp k: 2141
insolation: 3474
mass earth: 7.42
name: HD 20329 b
orbital period days: 0.9261
radius earth: 1.72
sys num planets: 1

About HD 20329 b

HD 20329 b is an anomaly exoplanet. It lies about 207.7 light-years from Earth, has an equilibrium temperature near 2,141 K, spans roughly 1.72 Earth radii and weighs about 7.42 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HD 20329 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 20329 b is an anomaly exoplanet

HD 20329 b scores 71 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 24 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Super-Earth, Lava world, Ultra-short period, Denser than iron, 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.