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Uncommon exoplanet 31 EP

GJ 411 b

RA 165.8345° · Dec 35.9723° · exoplanet

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Score breakdown

· 4 badges
31 pts · Uncommon
Uncommon 34 pts → Rare
  • Nearby (<25 ly) +12
  • Super-Earth +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 31

3 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • 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. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 2 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 7.5 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 March — that's when to go looking.

Could we get there?

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

Properties

density gcc
4.85
diameter km
18496.49
discovery facility
Haute-Provence Observatory
discovery method
Radial Velocity
discovery year
2019
dist ly
18.5119
eccentricity
0.063
eq temp k
349.83
host star teff
3719
insolation
3.13
mag
7.49
mass earth
2.69
name
GJ 411 b
orbital period days
12.9394
radius earth
1.45
semi major au
0.0788
spect
M1.5 V
sys num planets
2
sys num stars
1

About GJ 411 b

GJ 411 b is an uncommon exoplanet. It lies about 18.5 light-years from Earth, shines at apparent magnitude 7.49, has spectral type M1.5 V and has an equilibrium temperature near 350 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 7.49, it is an easy target for binoculars.

Like any astronomical target, GJ 411 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 GJ 411 b is an uncommon exoplanet

GJ 411 b scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Nearby (<25 ly), 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.