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Rare exoplanet 43 EP

GJ 687 c

RA 264.1042° · Dec 68.3337° · exoplanet

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Score breakdown

· 6 badges
43 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Frozen world +8
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • Neptune-like · +4
  • 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

  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • 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 9.2 you'll want a small backyard telescope.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around June — that's when to go looking.

Could we get there?

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

Properties

density gcc
1.24
diameter km
52810.668
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2020
dist ly
14.8381
eccentricity
0.4
eq temp k
98.62
host star teff
3413
insolation
0.0157
mag
9.15
mass earth
16
name
GJ 687 c
orbital period days
727.562
radius earth
4.14
semi major au
1.165
spect
M3.0V
sys num planets
2
sys num stars
1

About GJ 687 c

GJ 687 c is a rare exoplanet. It lies about 14.8 light-years from Earth, shines at apparent magnitude 9.15, has spectral type M3.0V and has an equilibrium temperature near 99 K.

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

How to see it

At apparent magnitude 9.15, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 687 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 687 c is a rare exoplanet

GJ 687 c scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Nearby (<25 ly), Neptune-like, 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.