Uncommon exoplanet 24 EP

HD 168443 b

RA 275.0160° · Dec -9.5967° · exoplanet

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Score breakdown

· 4 badges

24 pts · Uncommon

Uncommon 33 pts → Rare

Eccentric orbit +9
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 24

9 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Eccentric orbit · +9
Multi-planet system · +6

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 2.3 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 201.8 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1292 years in a starship at a tenth of light speed.
Distance. 129 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1897.

Saying hello

Say hello. A radio message and its reply would take 258 years round-trip.

Standing on it

A year here. A full year lasts just 58.1 Earth days.

By the numbers

Size. About 12.6× the width of Earth.
Volume. About 2000 Earths could fit inside it.
Mass. Roughly 2424× Earth's mass — about 7.6 Jupiters.
Your weight. You'd weigh about 15.3× your Earth weight standing here.
Temperature. A scorching 368°C on average.

How we found it

Discovery. Found by W. M. Keck Observatory using the radial velocity method.

Cosmic context

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

Properties

density gcc: 6.66
discovery facility: W. M. Keck Observatory
discovery method: Radial Velocity
dist ly: 129.2377
eccentricity: 0.53
eq temp k: 641.03
insolation: 28.2942
mass earth: 2424.3951
name: HD 168443 b
orbital period days: 58.1119
radius earth: 12.6
sys num planets: 2

About HD 168443 b

HD 168443 b is an uncommon exoplanet. It lies about 129.2 light-years from Earth, has an equilibrium temperature near 641 K, spans roughly 12.6 Earth radii and weighs about 2,424.4 Earth masses.

One of at least 2 planets orbiting its star.

How to see it

Like any astronomical target, HD 168443 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 168443 b is an uncommon exoplanet

HD 168443 b scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 points would lift it into a rarer tier.

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