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Epic exoplanet 51 EP

2MASS J21252752-8138278 b

RA 321.3663° · Dec -81.6415° · exoplanet

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Score breakdown

· 5 badges
51 pts · Epic
Epic 78 pts → Anomaly
  • Directly imaged +16
  • Lava world +14
  • Orbits beyond Neptune's distance +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 51

27 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Lava world · +14
  • Directly imaged · +16
  • Orbits beyond Neptune's distance · +12

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

  • 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 11.8 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 August — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
11
diameter km
158176.88
discovery facility
European Space Agency (ESA) Gaia Satellite
discovery method
Imaging
discovery year
2024
dist ly
111.2694
eq temp k
1616
host star teff
3592
insolation
0
mag
11.804
mass earth
3813.9409
name
2MASS J21252752-8138278 b
radius earth
12.4
semi major au
7493
sys num planets
1
sys num stars
1

About 2MASS J21252752-8138278 b

2MASS J21252752-8138278 b is an epic exoplanet. It lies about 111.3 light-years from Earth, shines at apparent magnitude 11.8, has an equilibrium temperature near 1,616 K and spans roughly 12.4 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 11.8, a small backyard telescope will bring it into view.

Like any astronomical target, 2MASS J21252752-8138278 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 2MASS J21252752-8138278 b is an epic exoplanet

2MASS J21252752-8138278 b scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Lava world, Directly imaged and Orbits beyond Neptune's distance — 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.