The LHS 1140 System
LHS 1140 is a planetary system in the constellation Cetus hosting 2 confirmed exoplanets, about 49 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
Size Comparison: The Planets of LHS 1140
LHS 1140: Star and Habitable Zone
LHS 1140
- Spectral type
- M4.5 V
- Surface temperature
- 3,096 K (Sun: 5,772 K)
- Mass
- 0.18 M☉
- Radius
- 0.22 R☉
- Luminosity
- 0.0038 L☉
- Age
- 5.0 billion years (Sun: 4.6)
Habitable zone of LHS 1140: 0.051–0.134 AU (conservative: 0.064–0.127 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 2 Planets in the LHS 1140 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| LHS 1140 b HZ | Super Earth | 25 d | 1.73 R⊕ | 0.66 | 2017 |
| LHS 1140 c | Super Earth | 3.8 d | 1.27 R⊕ | 0.51 | 2018 |
Discovery History
The first planet found here, LHS 1140 b, was discovered in 2017 using the transit method. The most recent addition, LHS 1140 c, followed in 2018.
- 2017 — LHS 1140 b (Transit)
- 2018 — LHS 1140 c (Transit)
Frequently Asked Questions About LHS 1140
How many planets does LHS 1140 have?
LHS 1140 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the LHS 1140 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is LHS 1140?
LHS 1140 is about 49 light-years from Earth in the constellation Cetus.
Explore the LHS 1140 system in the app
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