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Epic exoplanet 77 EP

GJ 1002 b

RA 1.6765° · Dec -7.5462° · exoplanet

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Score breakdown

· 6 badges
77 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Earth-sized +16
  • Nearby (<25 ly) +12
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 77

1 more point to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • In the habitable zone · +30
  • Earth-sized · +16
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.
  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 13.8 it is far too faint for the eye: this one belongs to cameras and long exposures.

Properties

density gcc
5.43
diameter km
13138.886
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
15.8142
eq temp k
230.9
habitable zone
yes
host star teff
3024
insolation
0.67
mag
13.76
mass earth
1.08
name
GJ 1002 b
orbital period days
10.3465
radius earth
1.03
semi major au
0.0457
spect
M5.5 V
sys num planets
2
sys num stars
1

About GJ 1002 b

GJ 1002 b is an epic exoplanet. It lies about 15.8 light-years from Earth, shines at apparent magnitude 13.76, has spectral type M5.5 V and has an equilibrium temperature near 231 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 13.76, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GJ 1002 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 1002 b is an epic exoplanet

GJ 1002 b scores 77 points on Spacedle's rarity scale, which places it in the epic tier. Another 1 point would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Nearby (<25 ly), In the habitable zone, Earth-sized, Multi-planet system and Orbits a red dwarf — 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.