Rare exoplanet 39 EP

HD 118203 b

RA 203.5100° · Dec 53.7282° · 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. ≈ 5.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 469.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 3009 years in a starship at a tenth of light speed.
Distance. 301 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1725.

Saying hello

Say hello. A radio message and its reply would take 602 years round-trip.

Standing on it

A year here. A full year lasts just 6.1 Earth days.

By the numbers

Size. About 12.8× the width of Earth.
Volume. About 2086 Earths could fit inside it.
Mass. Roughly 680× Earth's mass — about 2.1 Jupiters.
Your weight. You'd weigh about 4.2× your Earth weight standing here.
Temperature. Around 1088°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by Haute-Provence Observatory using the radial velocity method.

Cosmic context

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

Properties

density gcc: 1.79
discovery facility: Haute-Provence Observatory
discovery method: Radial Velocity
dist ly: 300.9079
eccentricity: 0.3136
eq temp k: 1361
insolation: 593.4
mass earth: 680.1528
name: HD 118203 b
orbital period days: 6.135
radius earth: 12.7782
sys num planets: 2

About HD 118203 b

HD 118203 b is a rare exoplanet. It lies about 300.9 light-years from Earth, has an equilibrium temperature near 1,361 K, spans roughly 12.78 Earth radii and weighs about 680.15 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HD 118203 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 118203 b is a rare exoplanet

HD 118203 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.