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Epic exoplanet 67 EP

TOI-4504 b

RA 114.4673° · Dec -62.0783° · exoplanet

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Score breakdown

· 9 badges
67 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Tidally locked +10
  • Eccentric orbit +9
  • Orbits a Sun-like star +8
  • Distant (over 1,000 light-years) +6
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 67

11 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Distant (over 1,000 light-years) · +6
  • Sub-Neptune · +5
  • Lava world · +14
  • Eccentric orbit · +9
  • Tidally locked · +10
  • Multi-planet system · +6
  • Found by TESS · +4
  • Orbits a Sun-like star · +8

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

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • 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 13.4 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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.

Properties

density gcc
44
diameter km
33803.93
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2024
dist ly
1117.4268
eccentricity
0.84
eq temp k
1345
host star teff
5315
inclination
92.4
insolation
548.0544
mag
13.364
mass earth
140
name
TOI-4504 b
orbital period days
2.4262
radius earth
2.65
semi major au
0.0338
spect
K1 V
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-4504 b

TOI-4504 b is an epic exoplanet. It lies about 1,117.4 light-years from Earth, shines at apparent magnitude 13.36, has spectral type K1 V and has an equilibrium temperature near 1,345 K.

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

How to see it

At apparent magnitude 13.36, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-4504 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-4504 b is an epic exoplanet

TOI-4504 b scores 67 points on Spacedle's rarity scale, which places it in the epic tier. Another 11 points would lift it into a rarer tier.

That score comes from 9 science badges — Confirmed exoplanet, Distant (over 1,000 light-years), Sub-Neptune, Lava world, Eccentric orbit, 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.