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Trash exoplanet 9 EP

Gaia-4 b

RA 209.5064° · Dec 31.6955° · exoplanet

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Score breakdown

· 2 badges
9 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 9

6 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4

Trivia

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 12.4 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.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 4.2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
10.8
diameter km
158176.88
discovery facility
European Space Agency (ESA) Gaia Satellite
discovery method
Astrometry
discovery year
2025
dist ly
239.6689
eccentricity
0.338
host star teff
4034
inclination
116.9
mag
12.405
mass earth
3750.3752
name
Gaia-4 b
orbital period days
571.3
radius earth
12.4
sys num planets
1
sys num stars
1

About Gaia-4 b

Gaia-4 b is a trash exoplanet. It lies about 239.7 light-years from Earth, shines at apparent magnitude 12.4, spans roughly 12.4 Earth radii and weighs about 3,750.38 Earth masses.

Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

How to see it

At apparent magnitude 12.4, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, Gaia-4 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 Gaia-4 b is a trash exoplanet

Gaia-4 b scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Gas giant — 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.