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Common exoplanet 21 EP

K2-419 A b

RA 135.0195° · Dec 13.2737° · exoplanet

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Score breakdown

· 3 badges
21 pts · Common
Common 22 pts → Uncommon
  • Two suns in its sky +12
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 21

1 more point to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Two suns in its sky · +12

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

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 16.5 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • 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 February — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.916
diameter km
134577.91
discovery facility
K2
discovery method
Transit
discovery year
2024
dist ly
876.3322
eccentricity
0.042
eq temp k
377
host star teff
3711
inclination
89.54
insolation
3.3
mag
16.52
mass earth
196
multi star system
yes
name
K2-419 A b
orbital period days
20.3585
radius earth
10.55
semi major au
0.1208
sys num planets
1
sys num stars
2

About K2-419 A b

K2-419 A b is a common exoplanet. It lies about 876.3 light-years from Earth, shines at apparent magnitude 16.52, has an equilibrium temperature near 377 K and spans roughly 10.55 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 16.52, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-419 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 K2-419 A b is a common exoplanet

K2-419 A b scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Two suns in its sky — 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.