Trash exoplanet 14 EP

Kepler-42 d

RA 292.2196° · Dec 44.6174° · exoplanet

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Score breakdown

· 3 badges

14 pts · Trash

Trash 15 pts → Common

Multi-planet system +6
Confirmed exoplanet +5
Found by Kepler +3

Total score 14

1 more point to reach Common.

Badges

Confirmed exoplanet · +5
Multi-planet system · +6
Found by Kepler · +3

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. ≈ 204 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1307 years in a starship at a tenth of light speed.
Distance. 131 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1895.

Saying hello

Say hello. A radio message and its reply would take 261 years round-trip.

Standing on it

A year here. A full year lasts just 1.9 Earth days.

By the numbers

Size. Around 57% of Earth's width.
Mass. About 0.4× the mass of Earth.
Your weight. You'd weigh about 1.1× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A scorching 177°C on average.

How we found it

Discovery. Found by Kepler using the transit method.

Cosmic context

Crowded system. One of at least 3 planets orbiting its star.

Properties

density gcc: 0.55
discovery facility: Kepler
discovery method: Transit
dist ly: 130.6565
eccentricity: 0.02
eq temp k: 450
insolation: 12.538
mass earth: 0.3578
name: Kepler-42 d
orbital period days: 1.8652
radius earth: 0.57
sys num planets: 3

About Kepler-42 d

Kepler-42 d is a trash exoplanet. It lies about 130.7 light-years from Earth, has an equilibrium temperature near 450 K, spans roughly 0.57 Earth radii and weighs about 0.36 Earth masses.

One of at least 3 planets orbiting its star.

How to see it

Like any astronomical target, Kepler-42 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 Kepler-42 d is a trash exoplanet

Kepler-42 d scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Multi-planet system and Found by Kepler — 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.