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Rare exoplanet 47 EP

GJ 1002 c

RA 1.6765° · Dec -7.5462° · exoplanet

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Score breakdown

· 5 badges
47 pts · Rare
Rare 50 pts → Epic
  • Earth-sized +16
  • Nearby (<25 ly) +12
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 47

3 more points to reach Epic.

Badges

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

Trivia

What makes it special

  • 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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • 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.
  • 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 September — that's when to go looking.

Properties

density gcc
5.61
diameter km
14031.82
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
15.8142
eq temp k
181.7
host star teff
3024
insolation
0.257
mag
13.76
mass earth
1.36
name
GJ 1002 c
orbital period days
21.202
radius earth
1.1
semi major au
0.0738
spect
M5.5 V
sys num planets
2
sys num stars
1

About GJ 1002 c

GJ 1002 c is a rare 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 182 K.

Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

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 c 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 c is a rare exoplanet

GJ 1002 c scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Nearby (<25 ly), 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.