Epic exoplanet 46 EP

TOI-1853 b

RA 211.4593° · Dec 16.9924° · exoplanet

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Score breakdown

· 5 badges

46 pts · Epic

Epic 68 pts → Anomaly

Denser than iron +18
Lava world +14
Confirmed exoplanet +5
Sub-Neptune +5
Found by TESS +4

Total score 46

22 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Sub-Neptune · +5
Lava world · +14
Denser than iron · +18
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. ≈ 9.5 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 840.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5385 years in a starship at a tenth of light speed.
Distance. 538 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1488.

Saying hello

Say hello. A radio message and its reply would take 1077 years round-trip.

Standing on it

A year here. A full year lasts just 1.2 Earth days.

By the numbers

Size. About 3.5× the width of Earth.
Volume. About 41.4 Earths could fit inside it.
Mass. Roughly 73.2× Earth's mass — about 0.2 Jupiters.
Your weight. You'd weigh about 6.1× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. Around 1206°C — hotter than a self-cleaning oven.

How we found it

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

Properties

density gcc: 9.74
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 538.4999
eccentricity: 0.03
eq temp k: 1479
insolation: 435.33
mass earth: 73.2
name: TOI-1853 b
orbital period days: 1.2436
radius earth: 3.46
sys num planets: 1

About TOI-1853 b

TOI-1853 b is an epic exoplanet. It lies about 538.5 light-years from Earth, has an equilibrium temperature near 1,479 K, spans roughly 3.46 Earth radii and weighs about 73.2 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, TOI-1853 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 TOI-1853 b is an epic exoplanet

TOI-1853 b scores 46 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Denser than iron 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.