Epic exoplanet 51 EP

HATS-40 b

RA 100.5712° · Dec -29.7768° · exoplanet

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Score breakdown

· 6 badges

51 pts · Epic

Epic 68 pts → Anomaly

Lava world +14
Hot Jupiter +10
Distant (>1000 ly) +10
Blasted by starlight +8
Confirmed exoplanet +5
Gas giant +4

Total score 51

17 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Blasted by starlight · +8
Distant (>1000 ly) · +10

Trivia

What makes it special

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

Could we get there?

Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

Aboard Voyager 1. ≈ 76.9 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 6.8 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 43.8 thousand years in a starship at a tenth of light speed.
Distance. 4378 light-years from Earth.

Look-back time

Look-back time. Its light left before the last ice age ended.

Saying hello

Say hello. A radio message and its reply would take 8756 years round-trip.

Standing on it

A year here. A full year lasts just 3.3 Earth days.

By the numbers

Size. About 17.7× the width of Earth.
Volume. About 5555 Earths could fit inside it.
Mass. Roughly 505× Earth's mass — about 1.6 Jupiters.
Your weight. You'd weigh about 1.6× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 2101 K — hot enough to vaporise iron.

How we found it

Discovery. Found by HATSouth using the transit method.

Properties

density gcc: 0.49
discovery facility: HATSouth
discovery method: Transit
dist ly: 4377.9594
eccentricity: 0.312
eq temp k: 2101
insolation: 3163.3762
mass earth: 505.3497
name: HATS-40 b
orbital period days: 3.2643
radius earth: 17.7102
sys num planets: 1

About HATS-40 b

HATS-40 b is an epic exoplanet. It lies about 4,378 light-years from Earth, has an equilibrium temperature near 2,101 K, spans roughly 17.71 Earth radii and weighs about 505.35 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, HATS-40 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 HATS-40 b is an epic exoplanet

HATS-40 b scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 17 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Blasted by starlight and Distant (>1000 ly) — 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.