Epic exoplanet 51 EP

AB Aur b

RA 73.9410° · Dec 30.5511° · exoplanet

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Score breakdown

· 5 badges

51 pts · Epic

Epic 68 pts → Anomaly

Denser than iron +18
Directly imaged +16
Frozen world +8
Confirmed exoplanet +5
Gas giant +4

Total score 51

17 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Denser than iron · +18
Directly imaged · +16

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.
Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 9.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 825.7 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5288 years in a starship at a tenth of light speed.
Distance. 529 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1497.

Saying hello

Say hello. A radio message and its reply would take 1058 years round-trip.

By the numbers

Size. About 12.5× the width of Earth.
Volume. About 1953 Earths could fit inside it.
Mass. Roughly 2860× Earth's mass — about 9 Jupiters.
Your weight. You'd weigh about 18.3× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A frigid -190°C — colder than dry ice.

How we found it

Discovery. Found by Subaru Telescope using the imaging method.

Properties

density gcc: 8.05
discovery facility: Subaru Telescope
discovery method: Imaging
dist ly: 528.7869
eccentricity: 0.4
eq temp k: 83.63
insolation: 0.0067
mass earth: 2860.4557
name: AB Aur b
radius earth: 12.5
sys num planets: 1

About AB Aur b

AB Aur b is an epic exoplanet. It lies about 528.8 light-years from Earth, has an equilibrium temperature near 84 K, spans roughly 12.5 Earth radii and weighs about 2,860.46 Earth masses.

A deep-frozen world far from its star's warmth.

How to see it

Like any astronomical target, AB Aur 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 AB Aur b is an epic exoplanet

AB Aur 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 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Denser than iron and Directly imaged — 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.