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Epic exoplanet 71 EP

2MASS J11550485-7919108 b

RA 178.7692° · Dec -79.3198° · exoplanet

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Score breakdown

· 6 badges
71 pts · Epic
Epic 78 pts → Anomaly
  • Ultra-hot Jupiter +26
  • Directly imaged +16
  • Orbits beyond Neptune's distance +12
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 71

7 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Ultra-hot Jupiter · +26
  • Directly imaged · +16
  • Orbits a red dwarf · +8
  • Orbits beyond Neptune's distance · +12

Trivia

What makes it special

  • Ultra-hot Jupiter. So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

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 17 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.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Could we get there?

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

Properties

density gcc
19.7
diameter km
154350.02
discovery facility
European Space Agency (ESA) Gaia Satellite
discovery method
Imaging
discovery year
2024
dist ly
328.9675
eq temp k
2506
host star teff
3021
insolation
0
mag
16.957
mass earth
6356.5681
name
2MASS J11550485-7919108 b
radius earth
12.1
semi major au
587
sys num planets
1
sys num stars
1

About 2MASS J11550485-7919108 b

2MASS J11550485-7919108 b is an epic exoplanet. It lies about 329 light-years from Earth, shines at apparent magnitude 16.96, has an equilibrium temperature near 2,506 K and spans roughly 12.1 Earth radii.

So hot that iron vaporises on the dayside, blows around to the night side and rains back down as molten metal.

How to see it

At apparent magnitude 16.96, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, 2MASS J11550485-7919108 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 J11550485-7919108 b is an epic exoplanet

2MASS J11550485-7919108 b scores 71 points on Spacedle's rarity scale, which places it in the epic tier. Another 7 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Ultra-hot Jupiter, Directly imaged, Orbits a red dwarf 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.