Rare exoplanet 34 EP

TOI-1117 b

RA 273.6021° · Dec -66.4200° · exoplanet

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Score breakdown

· 5 badges

34 pts · Rare

Rare 46 pts → Epic

Lava world +14
Multi-planet system +6
Confirmed exoplanet +5
Sub-Neptune +5
Found by TESS +4

Total score 34

12 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Sub-Neptune · +5
Lava world · +14
Multi-planet system · +6
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. ≈ 9.6 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 853.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5466 years in a starship at a tenth of light speed.
Distance. 547 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1479.

Saying hello

Say hello. A radio message and its reply would take 1093 years round-trip.

Standing on it

A year here. A full year lasts just 2.2 Earth days.

By the numbers

Size. About 2.5× the width of Earth.
Volume. About 14.9 Earths could fit inside it.
Mass. About 8.9× the mass of Earth.
Your weight. You'd weigh about 1.5× your Earth weight standing here.
Temperature. Around 1265°C — hotter than a self-cleaning oven.

How we found it

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

Cosmic context

Crowded system. One of at least 3 planets orbiting its star.

Properties

density gcc: 3.3
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 546.6309
eccentricity: 0
eq temp k: 1538
insolation: 928
mass earth: 8.9
name: TOI-1117 b
orbital period days: 2.2282
radius earth: 2.46
sys num planets: 3

About TOI-1117 b

TOI-1117 b is a rare exoplanet. It lies about 546.6 light-years from Earth, has an equilibrium temperature near 1,538 K, spans roughly 2.46 Earth radii and weighs about 8.9 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, TOI-1117 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-1117 b is a rare exoplanet

TOI-1117 b scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Multi-planet system 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.