Rare exoplanet 40 EP

Kepler-281 c

RA 294.1081° · Dec 44.7707° · exoplanet

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Score breakdown

· 6 badges

40 pts · Rare

Rare 46 pts → Epic

Puffy low-density world +12
Distant (>1000 ly) +10
Multi-planet system +6
Confirmed exoplanet +5
Neptune-like +4
Found by Kepler +3

Total score 40

6 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Neptune-like · +4
Puffy low-density world · +12
Multi-planet system · +6
Found by Kepler · +3
Distant (>1000 ly) · +10

Trivia

What makes it special

Cotton-candy planet. So low-density it would float on water.

Could we get there?

Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

Aboard Voyager 1. ≈ 100 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 8.9 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 56.9 thousand years in a starship at a tenth of light speed.
Distance. 5693 light-years from Earth.

Look-back time

Look-back time. Its light left before the last ice age ended.

Saying hello

Say hello. A radio message and its reply would take 11.4 thousand years round-trip.

Standing on it

A year here. A full year lasts just 36.3 Earth days.

By the numbers

Size. About 5.3× the width of Earth.
Volume. About 150 Earths could fit inside it.
Mass. Roughly 161× Earth's mass — about 0.5 Jupiters.
Your weight. You'd weigh about 5.7× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A scorching 240°C on average.

How we found it

Discovery. Found by Kepler using the transit method.

Cosmic context

Crowded system. One of at least 3 planets orbiting its star.

Properties

density gcc: 0.0051
discovery facility: Kepler
discovery method: Transit
dist ly: 5692.8899
eccentricity: 0
eq temp k: 513
insolation: 35.203
mass earth: 161.124
name: Kepler-281 c
orbital period days: 36.3374
radius earth: 5.31
sys num planets: 3

About Kepler-281 c

Kepler-281 c is a rare exoplanet. It lies about 5,692.9 light-years from Earth, has an equilibrium temperature near 513 K, spans roughly 5.31 Earth radii and weighs about 161.12 Earth masses.

So low-density it would float on water.

How to see it

Like any astronomical target, Kepler-281 c 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 Kepler-281 c is a rare exoplanet

Kepler-281 c scores 40 points on Spacedle's rarity scale, which places it in the rare tier. Another 6 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Neptune-like, Puffy low-density world, Multi-planet system, Found by Kepler and Distant (>1000 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.