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Uncommon exoplanet 30 EP

TOI-1438 c

RA 280.9238° · Dec 74.9378° · exoplanet

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Score breakdown

· 5 badges
30 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 30

4 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Multi-planet system · +6
  • Found by TESS · +4

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 11 you'll want a small backyard telescope.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Could we get there?

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

Properties

density gcc
2.9
diameter km
35079.55
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2025
dist ly
360.4448
eccentricity
0
eq temp k
794
host star teff
5230
inclination
87.61
insolation
65
mag
10.957
mass earth
10.6
name
TOI-1438 c
orbital period days
9.4281
radius earth
2.75
semi major au
0.083
spect
K0 V
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-1438 c

TOI-1438 c is an uncommon exoplanet. It lies about 360.4 light-years from Earth, shines at apparent magnitude 10.96, has spectral type K0 V and has an equilibrium temperature near 794 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 10.96, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-1438 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-1438 c is an uncommon exoplanet

TOI-1438 c scores 30 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked, 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.