Rare exoplanet 39 EP

HD 38529 b

RA 86.6451° · Dec 1.1676° · exoplanet

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Score breakdown

· 5 badges

39 pts · Rare

Rare 46 pts → Epic

Lava world +14
Hot Jupiter +10
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 39

7 more points to reach Epic.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Multi-planet system · +6

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 2.4 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 215.7 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1381 years in a starship at a tenth of light speed.
Distance. 138 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1888.

Saying hello

Say hello. A radio message and its reply would take 276 years round-trip.

Standing on it

A year here. A full year lasts just 14.3 Earth days.

By the numbers

Size. About 14.1× the width of Earth.
Volume. About 2803 Earths could fit inside it.
Mass. Roughly 207× Earth's mass — about 0.7 Jupiters.
Your weight. You'd weigh about 1.0× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1096°C — hotter than a self-cleaning oven.

How we found it

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

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 0.405
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 138.1395
eccentricity: 0.256
eq temp k: 1369.46
insolation: 516.1847
mass earth: 206.5885
name: HD 38529 b
orbital period days: 14.3099
radius earth: 14.1
sys num planets: 2

About HD 38529 b

HD 38529 b is a rare exoplanet. It lies about 138.1 light-years from Earth, has an equilibrium temperature near 1,369 K, spans roughly 14.1 Earth radii and weighs about 206.59 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HD 38529 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 38529 b is a rare exoplanet

HD 38529 b scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava 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.