Rare exoplanet 37 EP

TOI-1820 b

RA 187.6867° · Dec 27.4520° · exoplanet

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Score breakdown

· 5 badges

37 pts · Rare

Rare 46 pts → Epic

Lava world +14
Hot Jupiter +10
Confirmed exoplanet +5
Gas giant +4
Found by TESS +4

Total score 37

9 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Found by TESS · +4

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 14.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.3 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 8105 years in a starship at a tenth of light speed.
Distance. 811 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1215.

Saying hello

Say hello. A radio message and its reply would take 1621 years round-trip.

Standing on it

A year here. A full year lasts just 4.9 Earth days.

By the numbers

Size. About 12.8× the width of Earth.
Volume. About 2086 Earths could fit inside it.
Mass. Roughly 731× Earth's mass — about 2.3 Jupiters.
Your weight. You'd weigh about 4.5× your Earth weight standing here.
Temperature. Around 1102°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: 2
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 810.5107
eccentricity: 0.043
eq temp k: 1375
insolation: 292.245
mass earth: 731.0053
name: TOI-1820 b
orbital period days: 4.8607
radius earth: 12.7782
sys num planets: 1

Nearby objects

About TOI-1820 b

TOI-1820 b is a rare exoplanet. It lies about 810.5 light-years from Earth, has an equilibrium temperature near 1,375 K, spans roughly 12.78 Earth radii and weighs about 731.01 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, TOI-1820 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-1820 b is a rare exoplanet

TOI-1820 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world 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.