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Uncommon exoplanet 28 EP

GJ 887 c

RA 346.5028° · Dec -35.8473° · exoplanet

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Score breakdown

· 4 badges
28 pts · Uncommon
Uncommon 34 pts → Rare
  • Nearby (<25 ly) +12
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 28

6 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • Sub-Neptune · +5
  • Multi-planet system · +6

Trivia

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. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 4 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 7.6 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around September — that's when to go looking.

Could we get there?

  • Verdict. A multi-generation starship could one day attempt the crossing.

Properties

density gcc
2.49
diameter km
30997.566
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2020
dist ly
10.7201
eccentricity
0.17
eq temp k
320
host star teff
3688
insolation
2.5
mag
7.56
mass earth
6.5
name
GJ 887 c
orbital period days
21.784
radius earth
2.43
semi major au
0.121
spect
M1 V
sys num planets
4
sys num stars
1

About GJ 887 c

GJ 887 c is an uncommon exoplanet. It lies about 10.7 light-years from Earth, shines at apparent magnitude 7.56, has spectral type M1 V and has an equilibrium temperature near 320 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 7.56, it is an easy target for binoculars.

Like any astronomical target, GJ 887 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 887 c is an uncommon exoplanet

GJ 887 c scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Nearby (<25 ly), Sub-Neptune and Multi-planet system — 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.