Uncommon exoplanet 29 EP

TYC 2187-512-1 b

RA 320.5267° · Dec 22.9319° · exoplanet

Loading sky survey…

🌌 View in 3D star map

Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 4 badges

29 pts · Uncommon

Uncommon 33 pts → Rare

Puffy low-density world +12
Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 29

4 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 far from its star's warmth.
Cotton-candy planet. So low-density it would float on water.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 886.9 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 78.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 505 years in a starship at a tenth of light speed.
Distance. 50.5 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1976.

Saying hello

Say hello. A radio message and its reply would take 101 years round-trip.

Standing on it

A year here. A full year lasts just 692 Earth days.

By the numbers

Size. About 12.5× the width of Earth.
Volume. About 1953 Earths could fit inside it.
Mass. Roughly 105× Earth's mass — about 0.3 Jupiters.
Your weight. You'd weigh about 0.7× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A frigid -158°C — colder than dry ice.

How we found it

Discovery. Found by Calar Alto Observatory using the radial velocity method.

Properties

density gcc: 0.295
discovery facility: Calar Alto Observatory
discovery method: Radial Velocity
dist ly: 50.4707
eccentricity: 0.05
eq temp k: 114.69
insolation: 0.0279
mass earth: 104.8834
name: TYC 2187-512-1 b
orbital period days: 691.9
radius earth: 12.5
sys num planets: 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, has an equilibrium temperature near 115 K, spans roughly 12.5 Earth radii and weighs about 104.88 Earth masses.

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

How to see it

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 4 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.