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Uncommon exoplanet 25 EP

AU Mic e

RA 311.2911° · Dec -31.3424° · exoplanet

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Score breakdown

· 4 badges
25 pts · Uncommon
Uncommon 34 pts → Rare
  • Disputed — it may not be there at all +10
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Neptune-like +4
Total score 25

9 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Neptune-like · +4
  • Multi-planet system · +6
  • Disputed — it may not be there at all · +10

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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.
  • Crowded system. One of at least 4 planets orbiting its star.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 8.8 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around August — that's when to go looking.

Could we get there?

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

Properties

controversial
yes
density gcc
1
diameter km
62122.694
discovery facility
Mauna Kea Observatory
discovery method
Radial Velocity
discovery year
2025
dist ly
31.7092
host star teff
3665
mag
8.81
mass earth
21.1
name
AU Mic e
orbital period days
33.11
radius earth
4.87
spect
M1 V
sys num planets
4
sys num stars
1

About AU Mic e

AU Mic e is an uncommon exoplanet. It lies about 31.7 light-years from Earth, shines at apparent magnitude 8.81, has spectral type M1 V and spans roughly 4.87 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 8.81, it is an easy target for binoculars.

Like any astronomical target, AU Mic e 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 AU Mic e is an uncommon exoplanet

AU Mic e scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Neptune-like, Multi-planet system and Disputed — it may not be there at all — 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.