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Uncommon exoplanet 29 EP

TYC 2187-512-1 b

RA 320.5267° · Dec 22.9319° · exoplanet

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Score breakdown

· 4 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Puffy low-density world +12
  • Frozen world +8
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 29

5 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Frozen world · +8
  • Puffy low-density world · +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

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

What it actually is

  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

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 August — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.295
diameter km
159452.5
discovery facility
Calar Alto Observatory
discovery method
Radial Velocity
discovery year
2022
dist ly
50.4707
eccentricity
0.05
eq temp k
114.69
host star teff
3734
insolation
0.0279
mag
10.58
mass earth
104.8834
name
TYC 2187-512-1 b
orbital period days
691.9
radius earth
12.5
semi major au
1.22
spect
M1.0 V
sys num planets
1
sys num stars
1

About TYC 2187-512-1 b

TYC 2187-512-1 b is an uncommon exoplanet. It lies about 50.5 light-years from Earth, shines at apparent magnitude 10.58, has spectral type M1.0 V and has an equilibrium temperature near 115 K.

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

How to see it

At apparent magnitude 10.58, a small backyard telescope will bring it into view.

Like any astronomical target, TYC 2187-512-1 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 TYC 2187-512-1 b is an uncommon exoplanet

TYC 2187-512-1 b scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Frozen world and Puffy low-density 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.