Common exoplanet 20 EP

TOI-5398 c

RA 161.8796° · Dec 36.3294° · exoplanet

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Score breakdown

· 4 badges

20 pts · Common

Common 24 pts → Uncommon

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

Total score 20

4 more points to reach Uncommon.

Badges

Confirmed exoplanet · +5
Sub-Neptune · +5
Multi-planet system · +6
Found by TESS · +4

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 7.5 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 666.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 4268 years in a starship at a tenth of light speed.
Distance. 427 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1599.

Saying hello

Say hello. A radio message and its reply would take 854 years round-trip.

Standing on it

A year here. A full year lasts just 4.8 Earth days.

By the numbers

Size. About 3.5× the width of Earth.
Volume. About 43.6 Earths could fit inside it.
Mass. About 11.8× the mass of Earth.
Your weight. You'd weigh about 1.0× your Earth weight standing here.
Temperature. Around 969°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 2 planets orbiting its star.

Properties

density gcc: 1.5
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 426.7914
eccentricity: 0.14
eq temp k: 1242
insolation: 370.603
mass earth: 11.8
name: TOI-5398 c
orbital period days: 4.7727
radius earth: 3.52
sys num planets: 2

About TOI-5398 c

TOI-5398 c is a common exoplanet. It lies about 426.8 light-years from Earth, has an equilibrium temperature near 1,242 K, spans roughly 3.52 Earth radii and weighs about 11.8 Earth masses.

One of at least 2 planets orbiting its star.

How to see it

Like any astronomical target, TOI-5398 c 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-5398 c is a common exoplanet

TOI-5398 c scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, 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.