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Rare exoplanet 47 EP

GJ 3323 c

RA 75.4869° · Dec -6.9485° · exoplanet

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Score breakdown

· 6 badges
47 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Super-Earth +8
  • Frozen world +8
  • 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
  • Super-Earth · +8
  • Frozen world · +8
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Frozen world. A deep-frozen world, too far from its star's warmth for anything to stay liquid.

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 12.6 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 December — that's when to go looking.

Properties

density gcc
5.52
diameter km
16838.184
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2017
dist ly
17.5304
eccentricity
0.17
eq temp k
147.8
host star teff
3159
insolation
0.17
mag
12.57
mass earth
2.31
name
GJ 3323 c
orbital period days
40.54
radius earth
1.32
semi major au
0.1264
spect
M4
sys num planets
2
sys num stars
1

Nearby objects

About GJ 3323 c

GJ 3323 c is a rare exoplanet. It lies about 17.5 light-years from Earth, shines at apparent magnitude 12.57, has spectral type M4 and has an equilibrium temperature near 148 K.

A deep-frozen world, too far from its star's warmth for anything to stay liquid.

How to see it

At apparent magnitude 12.57, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, GJ 3323 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 3323 c is a rare exoplanet

GJ 3323 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 6 science badges — Confirmed exoplanet, Nearby (<25 ly), Super-Earth, Frozen world, 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.