Uncommon exoplanet 27 EP

V1298 Tau e

RA 61.3317° · Dec 20.1570° · exoplanet

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Score breakdown

· 4 badges

27 pts · Uncommon

Uncommon 33 pts → Rare

Puffy low-density world +12
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 27

6 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Puffy low-density world · +12
Multi-planet system · +6

Trivia

What makes it special

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. ≈ 6.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 551 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 3529 years in a starship at a tenth of light speed.
Distance. 353 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1673.

Saying hello

Say hello. A radio message and its reply would take 706 years round-trip.

Standing on it

A year here. A full year lasts just 48.7 Earth days.

By the numbers

Size. About 10.2× the width of Earth.
Volume. About 1052 Earths could fit inside it.
Mass. About 15.3× the mass of Earth.
Your weight. You'd weigh about 0.1× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A scorching 254°C on average.

How we found it

Discovery. Found by K2 using the transit method.

Cosmic context

Crowded system. One of at least 4 planets orbiting its star.

Properties

density gcc: 0.08
discovery facility: K2
discovery method: Transit
dist ly: 352.8975
eccentricity: 0.0124
eq temp k: 527
insolation: 10
mass earth: 15.3
name: V1298 Tau e
orbital period days: 48.6777
radius earth: 10.17
sys num planets: 4

About V1298 Tau e

V1298 Tau e is an uncommon exoplanet. It lies about 352.9 light-years from Earth, has an equilibrium temperature near 527 K, spans roughly 10.17 Earth radii and weighs about 15.3 Earth masses.

So low-density it would float on water.

How to see it

Like any astronomical target, V1298 Tau e 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 V1298 Tau e is an uncommon exoplanet

V1298 Tau e scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

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