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Uncommon exoplanet 26 EP

TOI-238 c

RA 349.2311° · Dec -18.6066° · exoplanet

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 26

8 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Multi-planet system · +6

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 10.7 you'll want a small backyard telescope.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around September — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.83
diameter km
27808.516
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2024
dist ly
262.6883
eccentricity
0.36
eq temp k
696
host star teff
5059
inclination
87.938
insolation
58.3
mag
10.748
mass earth
6.7
name
TOI-238 c
orbital period days
8.4657
radius earth
2.18
semi major au
0.0749
spect
K2V
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-238 c

TOI-238 c is an uncommon exoplanet. It lies about 262.7 light-years from Earth, shines at apparent magnitude 10.75, has spectral type K2V and has an equilibrium temperature near 696 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 10.75, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-238 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-238 c is an uncommon exoplanet

TOI-238 c scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked and Multi-planet system — 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.