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Uncommon exoplanet 24 EP

GJ 180 d

RA 73.4601° · Dec -17.7762° · exoplanet

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Score breakdown

· 4 badges
24 pts · Uncommon
Uncommon 34 pts → Rare
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Sub-Neptune +5
Total score 24

10 more points to reach Rare.

Badges

  • Confirmed exoplanet · +5
  • Sub-Neptune · +5
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What it actually is

  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.
  • Crowded system. One of at least 3 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 10.9 you'll want a small backyard telescope.
  • 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 December — 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. ≈ 684.4 thousand years at Voyager 1's speed (17 km/s).

Properties

density gcc
2.21
diameter km
33931.492
discovery facility
Multiple Facilities
discovery method
Radial Velocity
discovery year
2020
dist ly
38.9453
eccentricity
0.14
eq temp k
187.94
host star teff
3371
insolation
0.1362
mag
10.914
mass earth
7.56
name
GJ 180 d
orbital period days
106.3
radius earth
2.66
semi major au
0.309
spect
M3
sys num planets
3
sys num stars
1

About GJ 180 d

GJ 180 d is an uncommon exoplanet. It lies about 38.9 light-years from Earth, shines at apparent magnitude 10.91, has spectral type M3 and has an equilibrium temperature near 188 K.

Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

How to see it

At apparent magnitude 10.91, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 180 d 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 180 d is an uncommon exoplanet

GJ 180 d scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 10 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Sub-Neptune, Multi-planet system 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.