Uncommon exoplanet 31 EP

HD 63454 b

RA 114.8406° · Dec -78.2791° · exoplanet

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Score breakdown

· 4 badges

31 pts · Uncommon

Uncommon 33 pts → Rare

Puffy low-density world +12
Hot Jupiter +10
Confirmed exoplanet +5
Gas giant +4

Total score 31

2 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Puffy low-density world · +12

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. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 191.9 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1229 years in a starship at a tenth of light speed.
Distance. 123 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1903.

Saying hello

Say hello. A radio message and its reply would take 246 years round-trip.

Standing on it

A year here. A full year lasts just 2.8 Earth days.

By the numbers

Size. About 12.3× the width of Earth.
Volume. About 1865 Earths could fit inside it.
Mass. Roughly 79.5× Earth's mass — about 0.3 Jupiters.
Your weight. You'd weigh about 0.5× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 745°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by La Silla Observatory using the radial velocity method.

Properties

density gcc: 0.234
discovery facility: La Silla Observatory
discovery method: Radial Velocity
dist ly: 122.9262
eccentricity: 0
eq temp k: 1018.06
insolation: 159.9116
mass earth: 79.4575
name: HD 63454 b
orbital period days: 2.818
radius earth: 12.31
sys num planets: 1

About HD 63454 b

HD 63454 b is an uncommon exoplanet. It lies about 122.9 light-years from Earth, has an equilibrium temperature near 1,018 K, spans roughly 12.31 Earth radii and weighs about 79.46 Earth masses.

So low-density it would float on water.

How to see it

Like any astronomical target, HD 63454 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 HD 63454 b is an uncommon exoplanet

HD 63454 b scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter 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.