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Common exoplanet 19 EP

LHS 1903 e

RA 107.8658° · Dec 48.3279° · exoplanet

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Score breakdown

· 3 badges
19 pts · Common
Common 22 pts → Uncommon
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 19

3 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Multi-planet system · +6

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. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • Crowded system. One of at least 4 planets orbiting its star.

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 12.2 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.

Properties

density gcc
6.1
diameter km
22093.7384
discovery facility
CHaracterising ExOPlanets Satellite (CHEOPS)
discovery method
Transit
discovery year
2026
dist ly
116.4106
eccentricity
0.014
eq temp k
333
host star teff
3664
insolation
2.05
mag
12.23
mass earth
5.79
name
LHS 1903 e
orbital period days
29.3177
radius earth
1.732
semi major au
0.1514
spect
M
sys num planets
4
sys num stars
1

About LHS 1903 e

LHS 1903 e is a common exoplanet. It lies about 116.4 light-years from Earth, shines at apparent magnitude 12.23, has spectral type M and has an equilibrium temperature near 333 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 12.23, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, LHS 1903 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 LHS 1903 e is a common exoplanet

LHS 1903 e scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Super-Earth and Multi-planet system — 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.