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

8 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, too far from its star's warmth for anything to stay liquid.

What it actually is

  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 10.3 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around March — 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. ≈ 2.2 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
2.33
diameter km
167106.22
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2023
dist ly
126.1721
eccentricity
0.52
eq temp k
93.04
host star teff
4556.03
inclination
56
insolation
0.0125
mag
10.26
mass earth
953.4852
name
HD 108202 b
orbital period days
2990
radius earth
13.1
semi major au
3.7
spect
K4/5 V
sys num planets
1
sys num stars
1

About HD 108202 b

HD 108202 b is an uncommon exoplanet. It lies about 126.2 light-years from Earth, shines at apparent magnitude 10.26, has spectral type K4/5 V and has an equilibrium temperature near 93 K.

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

How to see it

At apparent magnitude 10.26, a small backyard telescope will bring it into view.

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 8 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.