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Rare exoplanet 43 EP

GJ 367 b

RA 146.1215° · Dec -45.7790° · exoplanet

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Score breakdown

· 5 badges
43 pts · Rare
Rare 50 pts → Epic
  • Lava world +14
  • Ultra-short period +14
  • Multi-planet system +6
  • Confirmed exoplanet +5
  • Found by TESS +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Lava world · +14
  • Ultra-short period · +14
  • Multi-planet system · +6
  • Found by TESS · +4

Trivia

What makes it special

  • Lava world. Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

Hard to believe

  • A year in a day. Its entire year is over in 7.7 hours. Birthdays here would come round faster than meals.

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 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 10.2 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.

Properties

density gcc
6.9
diameter km
9388.5632
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
discovery year
2021
dist ly
30.6999
eccentricity
0
eq temp k
1329
host star teff
3535
inclination
78.6
insolation
579
mag
10.153
mass earth
0.503
name
GJ 367 b
orbital period days
0.3219
radius earth
0.736
semi major au
0.0071
spect
M V
sys num planets
3
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About GJ 367 b

GJ 367 b is a rare exoplanet. It lies about 30.7 light-years from Earth, shines at apparent magnitude 10.15, has spectral type M V and has an equilibrium temperature near 1,329 K.

Its surface is almost certainly an ocean of molten rock, kept liquid by the star it hugs.

How to see it

At apparent magnitude 10.15, a small backyard telescope will bring it into view.

Like any astronomical target, GJ 367 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 367 b is a rare exoplanet

GJ 367 b scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Lava world, Ultra-short period, Multi-planet system and Found by TESS — 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.