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Trash exoplanet 13 EP

K2-184 b

RA 129.1405° · Dec 14.4619° · exoplanet

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Score breakdown

· 2 badges
13 pts · Trash
Trash 15 pts → Common
  • Super-Earth +8
  • Confirmed exoplanet +5
Total score 13

2 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 10.3 you'll want a small backyard telescope.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around January — that's when to go looking.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 4.3 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
4.77
diameter km
18751.614
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
246.5273
eq temp k
533
host star teff
5245
inclination
89.4664
insolation
14.0501
mag
10.345
mass earth
2.76
name
K2-184 b
orbital period days
16.978
radius earth
1.47
semi major au
0.1685
sys num planets
1
sys num stars
1

About K2-184 b

K2-184 b is a trash exoplanet. It lies about 246.5 light-years from Earth, shines at apparent magnitude 10.35, has an equilibrium temperature near 533 K and spans roughly 1.47 Earth radii.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 10.35, a small backyard telescope will bring it into view.

Like any astronomical target, K2-184 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 K2-184 b is a trash exoplanet

K2-184 b scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Super-Earth — 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.