Trash exoplanet 11 EP

HD 7924 d

RA 20.4957° · Dec 76.7101° · exoplanet

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Score breakdown

· 2 badges

11 pts · Trash

Trash 15 pts → Common

Multi-planet system +6
Confirmed exoplanet +5

Total score 11

4 more points to reach Common.

Badges

Confirmed exoplanet · +5
Multi-planet system · +6

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 973.9 thousand years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 86.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 554 years in a starship at a tenth of light speed.
Distance. 55.4 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1971.

Saying hello

Say hello. A radio message and its reply would take 111 years round-trip.

Standing on it

A year here. A full year lasts just 24.5 Earth days.

By the numbers

Mass. Roughly 1568× Earth's mass — about 4.9 Jupiters.
Temperature. A scorching 226°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 3 planets orbiting its star.

Properties

discovery facility: W. M. Keck Observatory
discovery method: Radial Velocity
dist ly: 55.4211
eccentricity: 0.21
eq temp k: 499
insolation: 15.17
mass earth: 1568.1654
name: HD 7924 d
orbital period days: 24.451
sys num planets: 3

About HD 7924 d

HD 7924 d is a trash exoplanet. It lies about 55.4 light-years from Earth, has an equilibrium temperature near 499 K, weighs about 1,568.17 Earth masses and completes an orbit every 24.45 days.

One of at least 3 planets orbiting its star.

How to see it

Like any astronomical target, HD 7924 d 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 7924 d is a trash exoplanet

HD 7924 d scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet 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.