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Epic exoplanet 56 EP

TOI-1853 b

RA 211.4593° · Dec 16.9924° · exoplanet

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Score breakdown

· 6 badges
56 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Found by TESS +4
Total score 56

22 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Lava world · +14
  • Tidally locked · +10
  • Denser than iron · +18
  • 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

  • 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.

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 12.2 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
9.74
diameter km
44136.452
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2023
dist ly
538.4999
eccentricity
0.03
eq temp k
1479
host star teff
4985
inclination
84.7
insolation
435.33
mag
12.178
mass earth
73.2
name
TOI-1853 b
orbital period days
1.2436
radius earth
3.46
semi major au
0.0213
spect
K2.5 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About TOI-1853 b

TOI-1853 b is an epic exoplanet. It lies about 538.5 light-years from Earth, shines at apparent magnitude 12.18, has spectral type K2.5 V and has an equilibrium temperature near 1,479 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 12.18, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, TOI-1853 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-1853 b is an epic exoplanet

TOI-1853 b scores 56 points on Spacedle's rarity scale, which places it in the epic tier. Another 22 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Tidally locked, Denser than iron 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.