Artist's impression of the planet LHS 1140 b and its host star
Discovery[1]
Discovered by
MEarth Project
Discovery date
20 April 2017 (Published)
Detection method
Transit
Orbital characteristics[2]
Semi-major axis
0.0946±0.0017 AU
Eccentricity
<0.043
Orbital period (sidereal)
24.7369148±0.0000058 d[3]
Inclination
89.86°±0.04°
Star
LHS 1140
Physical characteristics[2]
Mean radius
1.730±0.025 R🜨
Mass
5.60±0.19 M🜨
Mean density
5.9±0.3 g/cm3
Temperature
226±4 K (−47 °C; −53 °F, equilibrium)
LHS 1140 b is an exoplanet orbiting within the conservative habitable zone of the red dwarf LHS 1140. Discovered in 2017 by the MEarth Project,[1] LHS 1140 b is about 5.6 times the mass of Earth and about 70% larger in radius, putting it within the super-Earth category of planets. It was initially thought to be a dense rocky planet, but refined measurements of its mass and radius have found a lower density, indicating that it is likely an ocean world with 9-19% of its mass composed of water. LHS 1140 b orbits entirely within the star's habitable zone and gets 43% the incident flux of Earth.[2] The planet is 49 light-years away and transits its star, making it an excellent candidate for atmospheric studies with ground-based and/or space telescopes.[1]
^ abcCite error: The named reference Dittmann2017 was invoked but never defined (see the help page).
^ abcCite error: The named reference Cadieux2023 was invoked but never defined (see the help page).
^Cite error: The named reference Edwards2020 was invoked but never defined (see the help page).
LHS1140b is an exoplanet orbiting within the conservative habitable zone of the red dwarf LHS1140. Discovered in 2017 by the MEarth Project, LHS 1140...
LHS1140 is a red dwarf in the constellation of Cetus. Based on stellar parallax measurement, it is 48.8 light-years (15.0 parsecs) away from the Sun....
host star. LHS1140b, a huge rocky habitable zone planet around another quiet M-dwarf. List of potentially habitable exoplanets Luyten b, a potentially...
Mykhaylo; et al. (2024). "New Mass and Radius Constraints on the LHS1140 Planets -- LHS1140b is Either a Temperate Mini-Neptune or a Water World". The Astrophysical...
civilizations. LHS1140b, a massive habitable zone Super-Earth around another quiet star List of potentially habitable exoplanets Proxima Centauri b, the closest...
being composed of water. Additionally, models of the massive rocky planet LHS1140b suggest its surface may be covered in a deep ocean. Although 70.8% of...
the telescopes in Chile are also sensitive to red light. GJ 1214 b GJ 1132 bLHS1140b "The MEarth Project: Searching for Habitable Exoplanets around Nearby...
systems hosting potentially habitable exoplanets. The cases of LHS-1140b-c and K2-18 b-c". Monthly Notices of the Royal Astronomical Society. 494 (4):...
with six known planets Kepler-11 – star with six Neptune-like planets LHS1140 – star with a system of planets having an atmosphere List of potentially...
Term Variability in Dwarf M Stars". The Astronomical Journal. 107: 1135–1140. Bibcode:1994AJ....107.1135W. doi:10.1086/116925. Retrieved 20 January 2022...
Archived from the original on 2022-09-28. Retrieved 2022-02-25. "Planet LHS 1678 D". 2024. Koerner, D. W.; et al. (February 2010), "New Debris Disk Candidates...
component of a double star system designated WDS J01515-1020 (the secondary or 'B' component is HD 11366). Zeta Ceti's two components are therefore designated...
circularized during a mass-transfer event. The primary, component A, is a normal B-type star that has been given stellar classifications of B7 V and B7 IV. It...
Astronomers report the discovery of LHS 1140b, a rocky "super-Earth" in the habitable zone of a red dwarf star, LHS1140, which astronomers say is among the...
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