Epic exoplanet 47 EP

HAT-P-13 b

RA 129.8824° · Dec 47.3519° · exoplanet

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Score breakdown

· 6 badges

47 pts · Epic

Epic 68 pts → Anomaly

Lava world +14
Hot Jupiter +10
Blasted by starlight +8
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 47

21 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Multi-planet system · +6
Blasted by starlight · +8

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. ≈ 14.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.3 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 8050 years in a starship at a tenth of light speed.
Distance. 805 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1221.

Saying hello

Say hello. A radio message and its reply would take 1610 years round-trip.

Standing on it

A year here. A full year lasts just 2.9 Earth days.

By the numbers

Size. About 14.3× the width of Earth.
Volume. About 2899 Earths could fit inside it.
Mass. Roughly 270× Earth's mass — about 0.9 Jupiters.
Your weight. You'd weigh about 1.3× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1467°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by HATNet using the transit method.

Cosmic context

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

Properties

density gcc: 0.3408
discovery facility: HATNet
discovery method: Transit
dist ly: 804.9856
eccentricity: 0.0133
eq temp k: 1740
insolation: 1978.5245
mass earth: 270.462
name: HAT-P-13 b
orbital period days: 2.9162
radius earth: 14.258
sys num planets: 2

About HAT-P-13 b

HAT-P-13 b is an epic exoplanet. It lies about 805 light-years from Earth, has an equilibrium temperature near 1,740 K, spans roughly 14.26 Earth radii and weighs about 270.46 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HAT-P-13 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 HAT-P-13 b is an epic exoplanet

HAT-P-13 b scores 47 points on Spacedle's rarity scale, which places it in the epic tier. Another 21 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Multi-planet system and Blasted by starlight — 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.