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Uncommon exoplanet 26 EP

HD 108202 b

RA 186.4613° · Dec -1.1109° · exoplanet

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Score breakdown

· 4 badges
26 pts · Uncommon
Uncommon 33 pts → Rare
  • Eccentric orbit +9
  • Frozen world +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 26

7 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Eccentric orbit · +9

Trivia

What makes it special

  • Frozen world. A deep-frozen world far from its star's warmth.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 197 thousand years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 1262 years in a starship at a tenth of light speed.
  • Distance. 126 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1900.

Saying hello

  • Say hello. A radio message and its reply would take 252 years round-trip.

Standing on it

  • A year here. A full year lasts about 8.2 Earth years.

By the numbers

  • Size. About 13.1× the width of Earth.
  • Volume. About 2248 Earths could fit inside it.
  • Mass. Roughly 953× Earth's mass — about 3 Jupiters.
  • Your weight. You'd weigh about 5.6× your Earth weight standing here.
  • Temperature. A frigid -180°C — colder than dry ice.

How we found it

  • Discovery. Found by La Silla Observatory using the radial velocity method.

Properties

density gcc
2.33
discovery facility
La Silla Observatory
discovery method
Radial Velocity
dist ly
126.1721
eccentricity
0.52
eq temp k
93.04
insolation
0.0125
mass earth
953.4852
name
HD 108202 b
orbital period days
2990
radius earth
13.1
sys num planets
1

About HD 108202 b

HD 108202 b is an uncommon exoplanet. It lies about 126.2 light-years from Earth, has an equilibrium temperature near 93 K, spans roughly 13.1 Earth radii and weighs about 953.49 Earth masses.

A deep-frozen world far from its star's warmth.

How to see it

Like any astronomical target, HD 108202 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 HD 108202 b is an uncommon exoplanet

HD 108202 b scores 26 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Eccentric orbit — 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.

spacedle A daily roll through the real universe. © 2026 spacedle. Buy me a coffee

Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.