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Uncommon exoplanet 23 EP

GJ 508.2 b

RA 200.2444° · Dec 34.2777° · exoplanet

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Score breakdown

· 3 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Long-period world +10
  • Frozen world +8
  • Confirmed exoplanet +5
Total score 23

11 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Frozen world · +8
  • Long-period world · +10

Trivia

What makes it special

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

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 10.6 you'll want a small backyard telescope.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around April — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 953.6 thousand years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 84.7 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

discovery facility
Calar Alto Observatory
discovery method
Radial Velocity
discovery year
2025
dist ly
54.2639
eccentricity
0.27
eq temp k
59.3
host star teff
3720
insolation
0.0025
mag
10.61
mass earth
587.9826
name
GJ 508.2 b
orbital period days
5300
semi major au
4.85
spect
M1.0 V
sys num planets
1
sys num stars
1

About GJ 508.2 b

GJ 508.2 b is an uncommon exoplanet. It lies about 54.3 light-years from Earth, shines at apparent magnitude 10.61, has spectral type M1.0 V and has an equilibrium temperature near 59 K.

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

How to see it

At apparent magnitude 10.61, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 508.2 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 508.2 b is an uncommon exoplanet

GJ 508.2 b scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Frozen world and Long-period world — 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.