Uncommon exoplanet 31 EP

HD 33283 b

RA 77.0045° · Dec -26.7977° · 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. ≈ 5.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 457.6 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 2931 years in a starship at a tenth of light speed.
Distance. 293 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1733.

Saying hello

Say hello. A radio message and its reply would take 586 years round-trip.

Standing on it

A year here. A full year lasts just 18.2 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. Around 761°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by W. M. Keck Observatory using the radial velocity method.

Properties

density gcc: 0.294
discovery facility: W. M. Keck Observatory
discovery method: Radial Velocity
dist ly: 293.0913
eccentricity: 0.399
eq temp k: 1034.4
insolation: 191.9541
mass earth: 104.5661
name: HD 33283 b
orbital period days: 18.1991
radius earth: 12.5
sys num planets: 1

About HD 33283 b

HD 33283 b is an uncommon exoplanet. It lies about 293.1 light-years from Earth, has an equilibrium temperature near 1,034 K, spans roughly 12.5 Earth radii and weighs about 104.57 Earth masses.

So low-density it would float on water.

How to see it

Like any astronomical target, HD 33283 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 33283 b is an uncommon exoplanet

HD 33283 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.