Uncommon exoplanet 29 EP

eps Eri b

RA 53.2284° · Dec -9.4582° · exoplanet

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Score breakdown

· 4 badges

29 pts · Uncommon

Uncommon 33 pts → Rare

Nearby (<25 ly) +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
Nearby (<25 ly) · +12

Trivia

What makes it special

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

Could we get there?

Verdict. A multi-generation starship could one day attempt the crossing.

Getting there

Aboard Voyager 1. ≈ 183.6 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 16.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 104 years in a starship at a tenth of light speed.
Distance. 10.4 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 2016.

Saying hello

Say hello. A radio message and its reply would take 20.9 years round-trip.

Standing on it

A year here. A full year lasts about 7.3 Earth years.

By the numbers

Size. About 14.1× the width of Earth.
Volume. About 2803 Earths could fit inside it.
Mass. Roughly 210× Earth's mass — about 0.7 Jupiters.
Your weight. You'd weigh about 1.1× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A frigid -161°C — colder than dry ice.

How we found it

Discovery. Found by Multiple Observatories using the radial velocity method.

Properties

density gcc: 0.411
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 10.4455
eccentricity: 0.07
eq temp k: 112.26
insolation: 0.0306
mass earth: 209.7667
name: eps Eri b
orbital period days: 2671
radius earth: 14.1
sys num planets: 1

About eps Eri b

eps Eri b is an uncommon exoplanet. It lies about 10.4 light-years from Earth, has an equilibrium temperature near 112 K, spans roughly 14.1 Earth radii and weighs about 209.77 Earth masses.

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

How to see it

Like any astronomical target, eps Eri 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 eps Eri b is an uncommon exoplanet

eps Eri 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 Nearby (<25 ly) — 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.