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Rare exoplanet 49 EP

TOI-375 b

RA 47.1499° · Dec -77.3833° · exoplanet

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Score breakdown

· 7 badges
49 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Tidally locked +10
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 49

1 more point to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Gas giant · +4
  • Lava world · +14
  • Tidally locked · +10
  • Multi-planet system · +6
  • Found by TESS · +4

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • Crowded system. One of at least 3 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 11.5 you'll want a small backyard telescope.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Properties

density gcc
1.037
diameter km
137407.6236
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2026
dist ly
1292.2725
eccentricity
0.087
eq temp k
1373
host star teff
5259.9
insolation
593.3
mag
11.516
mass earth
236.7822
name
TOI-375 b
orbital period days
9.4547
radius earth
10.7718
semi major au
0.099
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-375 b

TOI-375 b is a rare exoplanet. It lies about 1,292.3 light-years from Earth, shines at apparent magnitude 11.52, has an equilibrium temperature near 1,373 K and spans roughly 10.77 Earth radii.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 11.52, a small backyard telescope will bring it into view.

Like any astronomical target, TOI-375 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-375 b is a rare exoplanet

TOI-375 b scores 49 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Gas giant, Lava world, 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.