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Epic exoplanet 52 EP

GJ 2030 b

RA 50.8238° · Dec -7.7950° · exoplanet

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Score breakdown

· 7 badges
52 pts · Epic
Epic 78 pts → Anomaly
  • Lava world +14
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
  • Blasted by starlight +4
Total score 52

26 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Lava world · +14
  • Tidally locked · +10
  • Multi-planet system · +6
  • Blasted by starlight · +4
  • Orbits a Sun-like star · +8

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 2 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 6.2 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around November — that's when to go looking.

Properties

density gcc
3.13
diameter km
25895.086
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
120.9347
eccentricity
0.239
eq temp k
2147.31
host star teff
5485
insolation
3542.7587
mag
6.209
mass earth
4.7674
name
GJ 2030 b
orbital period days
2.3813
radius earth
2.03
semi major au
0.034
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About GJ 2030 b

GJ 2030 b is an epic exoplanet. It lies about 120.9 light-years from Earth, shines at apparent magnitude 6.21, has an equilibrium temperature near 2,147 K and spans roughly 2.03 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 6.21, it is an easy target for binoculars.

Like any astronomical target, GJ 2030 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 GJ 2030 b is an epic exoplanet

GJ 2030 b scores 52 points on Spacedle's rarity scale, which places it in the epic tier. Another 26 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Sub-Neptune, Lava world, Tidally locked, Multi-planet system, Blasted by starlight 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.