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Common exoplanet 18 EP

LSPM J2116+0234 b

RA 319.1148° · Dec 2.5808° · exoplanet

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Score breakdown

· 3 badges
18 pts · Common
Common 22 pts → Uncommon
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 18

4 more points to reach Uncommon.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Orbits a red dwarf · +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. 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. 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 12 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • 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.

Getting there

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

Properties

density gcc
1.43
diameter km
47325.502
discovery facility
Calar Alto Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
57.5003
eccentricity
0.183
eq temp k
371.68
host star teff
3475
insolation
2.6063
mag
11.961
mass earth
13.3
name
LSPM J2116+0234 b
orbital period days
14.4399
radius earth
3.71
semi major au
0.0876
spect
M3.0 V
sys num planets
1
sys num stars
1

About LSPM J2116+0234 b

LSPM J2116+0234 b is a common exoplanet. It lies about 57.5 light-years from Earth, shines at apparent magnitude 11.96, has spectral type M3.0 V and has an equilibrium temperature near 372 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 11.96, a small backyard telescope will bring it into view.

Like any astronomical target, LSPM J2116+0234 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 LSPM J2116+0234 b is a common exoplanet

LSPM J2116+0234 b scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Orbits a red dwarf — 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.