Rare exoplanet 43 EP

WISEP J121756.91+162640.2 A b

RA 184.4871° · Dec 16.4445° · exoplanet

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Score breakdown

· 4 badges

43 pts · Rare

Rare 46 pts → Epic

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

Total score 43

3 more points to reach Epic.

Badges

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

Trivia

What makes it special

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. ≈ 578.9 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 51.4 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 329 years in a starship at a tenth of light speed.
Distance. 32.9 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1993.

Saying hello

Say hello. A radio message and its reply would take 65.9 years round-trip.

By the numbers

Size. About 10.5× the width of Earth.
Volume. About 1147 Earths could fit inside it.
Mass. Roughly 6992× Earth's mass — about 22 Jupiters.
Your weight. You'd weigh about 63.8× your Earth weight standing here.
Density. Denser than solid iron.
Temperature. A scorching 177°C on average.

How we found it

Discovery. Found by W. M. Keck Observatory using the imaging method.

Properties

density gcc: 33.5
discovery facility: W. M. Keck Observatory
discovery method: Imaging
dist ly: 32.9418
eq temp k: 450
insolation: 0
mass earth: 6992
name: WISEP J121756.91+162640.2 A b
radius earth: 10.468
sys num planets: 1

About WISEP J121756.91+162640.2 A b

WISEP J121756.91+162640.2 A b is a rare exoplanet. It lies about 32.9 light-years from Earth, has an equilibrium temperature near 450 K, spans roughly 10.47 Earth radii and weighs about 6,992 Earth masses.

Packed denser than solid iron.

How to see it

Like any astronomical target, WISEP J121756.91+162640.2 A 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 WISEP J121756.91+162640.2 A b is a rare exoplanet

WISEP J121756.91+162640.2 A b scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, 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.