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Rare exoplanet 47 EP

GJ 832 b

RA 323.3913° · Dec -49.0125° · exoplanet

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Score breakdown

· 6 badges
47 pts · Rare
Rare 50 pts → Epic
  • Nearby (<25 ly) +12
  • Long-period world +10
  • Frozen world +8
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 47

3 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • 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.

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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.

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 8.7 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 August — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.658
diameter km
176035.56
discovery facility
Anglo-Australian Telescope
discovery method
Radial Velocity
discovery year
2008
dist ly
16.1915
eccentricity
0.05
eq temp k
57.84
host star teff
3472
inclination
51
insolation
0.0019
mag
8.66
mass earth
314.6501
name
GJ 832 b
orbital period days
3853
radius earth
13.8
semi major au
3.7
spect
M2/3 V
sys num planets
1
sys num stars
1

Nearby objects

About GJ 832 b

GJ 832 b is a rare exoplanet. It lies about 16.2 light-years from Earth, shines at apparent magnitude 8.66, has spectral type M2/3 V and has an equilibrium temperature near 58 K.

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

How to see it

At apparent magnitude 8.66, it is an easy target for binoculars.

Like any astronomical target, GJ 832 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 832 b is a rare exoplanet

GJ 832 b 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), Gas giant, Frozen world, Long-period world 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.