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Epic exoplanet 57 EP

LHS 1140 b

RA 11.2486° · Dec -15.2741° · exoplanet

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Score breakdown

· 5 badges
57 pts · Epic
Epic 78 pts → Anomaly
  • In the habitable zone +30
  • Super-Earth +8
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 57

21 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • In the habitable zone · +30
  • Super-Earth · +8
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

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.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.
  • 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 14.2 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.

Properties

density gcc
5.9
diameter km
22068.226
discovery facility
MEarth Project
discovery method
Transit
discovery year
2017
dist ly
48.8781
eccentricity
0.043
eq temp k
226
habitable zone
yes
host star teff
3096
inclination
89.86
insolation
0.43
mag
14.15
mass earth
5.6
name
LHS 1140 b
orbital period days
24.7372
radius earth
1.73
semi major au
0.0946
spect
M4.5 V
sys num planets
2
sys num stars
1

About LHS 1140 b

LHS 1140 b is an epic exoplanet. It lies about 48.9 light-years from Earth, shines at apparent magnitude 14.15, has spectral type M4.5 V and has an equilibrium temperature near 226 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 14.15, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, LHS 1140 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 LHS 1140 b is an epic exoplanet

LHS 1140 b scores 57 points on Spacedle's rarity scale, which places it in the epic tier. Another 21 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, In the habitable zone, Super-Earth, 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.