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Epic exoplanet 53 EP

HD 224018 b

RA 358.6390° · Dec -4.7233° · exoplanet

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Score breakdown

· 5 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Denser than iron +18
  • Earth-sized +16
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 53

25 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Earth-sized · +16
  • Denser than iron · +18
  • Multi-planet system · +6
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

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 9.7 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.

Properties

density gcc
17.1
diameter km
11608.142
discovery facility
Roque de los Muchachos Observatory
discovery method
Radial Velocity
discovery year
2025
dist ly
344.0293
eccentricity
0.06
eq temp k
968
host star teff
5784
inclination
86.7
insolation
146.7499
mag
9.715
mass earth
4.1
name
HD 224018 b
orbital period days
10.6413
radius earth
0.91
semi major au
0.0952
spect
G V
sys num planets
3
sys num stars
1

About HD 224018 b

HD 224018 b is an epic exoplanet. It lies about 344 light-years from Earth, shines at apparent magnitude 9.71, has spectral type G V and has an equilibrium temperature near 968 K.

Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

How to see it

At apparent magnitude 9.71, a small backyard telescope will bring it into view.

Like any astronomical target, HD 224018 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 HD 224018 b is an epic exoplanet

HD 224018 b scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Earth-sized, Denser than iron, Multi-planet system and Orbits a Sun-like star — 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.