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Uncommon exoplanet 28 EP

K2-180 b

RA 126.4644° · Dec 10.2466° · exoplanet

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Score breakdown

· 4 badges
28 pts · Uncommon
Uncommon 34 pts → Rare
  • Tidally locked +10
  • Orbits a Sun-like star +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 28

6 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Tidally locked · +10
  • Orbits a Sun-like star · +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 12.6 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 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. ≈ 11.7 million years at Voyager 1's speed (17 km/s).

Properties

density gcc
4.16
diameter km
31456.4799
discovery facility
K2
discovery method
Transit
discovery year
2018
dist ly
665.019
eccentricity
0.075
eq temp k
797.5
host star teff
5365
inclination
89.15
insolation
48.3
mag
12.557
mass earth
11.41
name
K2-180 b
orbital period days
8.8657
radius earth
2.466
semi major au
0.0756
spect
K2 V
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-180 b

K2-180 b is an uncommon exoplanet. It lies about 665 light-years from Earth, shines at apparent magnitude 12.56, has spectral type K2 V and has an equilibrium temperature near 798 K.

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 12.56, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-180 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 K2-180 b is an uncommon exoplanet

K2-180 b scores 28 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Tidally locked and Orbits a Sun-like star — 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.