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Rare exoplanet 45 EP

TOI-5736 b

RA 213.7584° · Dec 49.5009° · exoplanet

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Score breakdown

· 5 badges
45 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Ultra-short period +14
  • Super-Earth +8
  • Confirmed exoplanet +5
  • Found by TESS +4
Total score 45

5 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Lava world · +14
  • Ultra-short period · +14
  • 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.

Hard to believe

  • A year in a day. Its entire year is over in 15.6 hours. Birthdays here would come round faster than meals.

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

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 13.6 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around April — that's when to go looking.

Properties

density gcc
4.41
diameter km
19899.672
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2025
dist ly
301.239
eq temp k
1311
host star teff
3949
inclination
84.5
insolation
493.4827
mag
13.553
mass earth
3.05
name
TOI-5736 b
orbital period days
0.649
radius earth
1.56
sys num planets
1
sys num stars
1

About TOI-5736 b

TOI-5736 b is a rare exoplanet. It lies about 301.2 light-years from Earth, shines at apparent magnitude 13.55, has an equilibrium temperature near 1,311 K and spans roughly 1.56 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 13.55, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-5736 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-5736 b is a rare exoplanet

TOI-5736 b scores 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 5 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Super-Earth, Lava world, Ultra-short period 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.