About GJ 680 b
GJ 680 b is a rare exoplanet. It lies about 31.5 light-years from Earth, has an equilibrium temperature near 37 K, spans roughly 12 Earth radii and weighs about 7,977.49 Earth masses.
A deep-frozen world far from its star's warmth.
Rare exoplanet 45 EP
GJ 680 b
RA 263.8072° · Dec -48.6788° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Denser than iron +18
- Long-period world +10
- Frozen world +8
- Confirmed exoplanet +5
- Gas giant +4
Total score 45
1 more point to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Frozen world · +8
- Long-period world · +10
- Denser than iron · +18
Trivia
What makes it special
- Frozen world. A deep-frozen world far from its star's warmth.
- Heavyweight. Packed denser than solid iron.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 554.4 thousand years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 49.3 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 315 years in a starship at a tenth of light speed.
- Distance. 31.5 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1994.
Saying hello
- Say hello. A radio message and its reply would take 63.1 years round-trip.
Standing on it
- A year here. A full year lasts about 47.3 Earth years.
By the numbers
- Size. About 12× the width of Earth.
- Volume. About 1728 Earths could fit inside it.
- Mass. Roughly 7977× Earth's mass — about 25.1 Jupiters.
- Your weight. You'd weigh about 55.4× your Earth weight standing here.
- Density. Denser than solid iron.
- Temperature. A frigid -237°C — colder than dry ice.
How we found it
- Discovery. Found by Multiple Observatories using the radial velocity method.
Properties
- density gcc
- 25.4
- discovery facility
- Multiple Observatories
- discovery method
- Radial Velocity
- dist ly
- 31.5496
- eccentricity
- 0.381
- eq temp k
- 36.57
- insolation
- 0.0003
- mass earth
- 7977.493
- name
- GJ 680 b
- orbital period days
- 17281.6651
- radius earth
- 12
- sys num planets
- 1
How to see it
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 45 points on Spacedle's rarity scale, which places it in the rare tier. Another 1 point would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world and Denser than iron — 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.