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Rare exoplanet 39 EP

GJ 680 b

RA 263.8072° · Dec -48.6788° · exoplanet

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Score breakdown

· 5 badges
39 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Long-period world +10
  • Frozen world +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 39

11 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Long-period world · +10
  • Two suns in its sky · +12

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

  • Denser than iron. It is packed tighter than solid iron — whatever it is made of, it is not ordinary rock.

What it actually is

  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.

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 10.1 you'll want a small backyard telescope.
  • 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 June — that's when to go looking.

Could we get there?

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

Properties

density gcc
25.4
diameter km
153074.4
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2022
dist ly
31.5496
eccentricity
0.381
eq temp k
36.57
host star teff
3563
inclination
21.984
insolation
0.0003
mag
10.129
mass earth
7977.493
multi star system
yes
name
GJ 680 b
orbital period days
17281.6651
radius earth
12
semi major au
10.138
spect
K5
sys num planets
1
sys num stars
2

About GJ 680 b

GJ 680 b is a rare exoplanet. It lies about 31.5 light-years from Earth, shines at apparent magnitude 10.13, has spectral type K5 and has an equilibrium temperature near 37 K.

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

How to see it

At apparent magnitude 10.13, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 680 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 680 b is a rare exoplanet

GJ 680 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world and Two suns in its sky — 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.