Discovery | |
---|---|
Discovered by | Teruyuki Hirano et al. [1] |
Discovery site | Tokyo Institute of Technology |
Discovery date | March 2018 |
Transit method | |
Designations | |
LP 415-17 c, EPIC 210897587 c [2] | |
Orbital characteristics | |
0.1886 (± 0.0066) [3] AU | |
Eccentricity | unknown |
40.6835 (± 0.0031) [3] d | |
Inclination | unknown |
Star | K2-155 |
Physical characteristics | |
1.64 +0.18 −0.17 [3] R🜨 | |
Mean
density | 5.41±1.11 g/cm3 |
Temperature | 289 K (16 °C; 61 °F) [4] |
K2-155d is a potentially habitable Super-Earth exoplanet in the K2-155 system. [5] It is the outermost of three known planets orbiting around the K-type star K2-155 in the constellation Taurus. [6] It is one of 15 new exoplanets around red dwarf stars discovered by Japanese astronomer Teruyuki Hirano of the Tokyo Institute of Technology and his team. [1] The team used data from NASA's Kepler Space Telescope during its extended K2 "Second Light" mission. K2-155d orbits near the so-called habitable zone of its system, and has the potential to host liquid water. [7] [5]
K2-155d is one of 15 exoplanets discovered by a team of Japanese astronomers led by Teruyuki Hirano at the Tokyo Institute of Technology. [5] Its discovery is based on data from the K2 mission of NASA's Kepler spacecraft. [5] The exoplanet has also been observed from ground-based telescopes including the Nordic Optical Telescope (NOT) in La Palma and the Subaru Telescope in Hawaii. [5] Its characteristics were confirmed using speckle imaging and high-dispersion optical spectroscopy. [3] The mass of K2-155d and the brightness of its host star may be measured by future observations from the W. M. Keck Observatory and the James Webb Space Telescope. [3] The brightness of its host star makes K2-155d a good target for future studies using instruments such as the James Webb Space Telescope. [3]
K2-155d is a super-Earth exoplanet with a radius 1.64 times that of Earth, near the transition zone between small rock-based and larger gaseous planets. [8] [3] [7] Climate models predict that it is located near its star's habitable zone and has an insolation 1.67 ± 0.38 (between 1.29 and 2.05) times that of Earth. [3] Its physical temperature is estimated to be 289 K (16 degrees Celsius or 61 degrees Fahrenheit). [4] Studies have shown that the planet would maintain a moderate surface temperature if its insolation is smaller than ~1.5 times that of Earth. [3]
K2-155d is one of three known planets in the system orbiting K2-155, a red dwarf star located 62.3 parsecs (203 ly) from Earth. [3] Its parent star has 88% less volume than the Sun. [9] K2-155d orbits its star with a 40.7 day period, but as the planet is tidally locked the same side always faces its sun. [5] K2-155d has an orbital radius of 0.1886 AU [8] and studies suggest that the planet has a low orbital eccentricity. [10]
K2-155d has been labeled a potentially habitable planet that may be able to harbor liquid water. [7] [5] A three-dimensional climate simulation was used to confirm the possibility of the existence of water. [5] However, its discoverer Teruyuki Hirano was cautious about the findings, stating that they do not guarantee K2-155d is habitable, as the ranges in its orbit and temperature allow the possibility of it being outside the habitable zone. [7] Factors such as the absence of solar flares could also decide if K2-155d is habitable. [5]
Discovery | |
---|---|
Discovered by | Teruyuki Hirano et al. [1] |
Discovery site | Tokyo Institute of Technology |
Discovery date | March 2018 |
Transit method | |
Designations | |
LP 415-17 c, EPIC 210897587 c [2] | |
Orbital characteristics | |
0.1886 (± 0.0066) [3] AU | |
Eccentricity | unknown |
40.6835 (± 0.0031) [3] d | |
Inclination | unknown |
Star | K2-155 |
Physical characteristics | |
1.64 +0.18 −0.17 [3] R🜨 | |
Mean
density | 5.41±1.11 g/cm3 |
Temperature | 289 K (16 °C; 61 °F) [4] |
K2-155d is a potentially habitable Super-Earth exoplanet in the K2-155 system. [5] It is the outermost of three known planets orbiting around the K-type star K2-155 in the constellation Taurus. [6] It is one of 15 new exoplanets around red dwarf stars discovered by Japanese astronomer Teruyuki Hirano of the Tokyo Institute of Technology and his team. [1] The team used data from NASA's Kepler Space Telescope during its extended K2 "Second Light" mission. K2-155d orbits near the so-called habitable zone of its system, and has the potential to host liquid water. [7] [5]
K2-155d is one of 15 exoplanets discovered by a team of Japanese astronomers led by Teruyuki Hirano at the Tokyo Institute of Technology. [5] Its discovery is based on data from the K2 mission of NASA's Kepler spacecraft. [5] The exoplanet has also been observed from ground-based telescopes including the Nordic Optical Telescope (NOT) in La Palma and the Subaru Telescope in Hawaii. [5] Its characteristics were confirmed using speckle imaging and high-dispersion optical spectroscopy. [3] The mass of K2-155d and the brightness of its host star may be measured by future observations from the W. M. Keck Observatory and the James Webb Space Telescope. [3] The brightness of its host star makes K2-155d a good target for future studies using instruments such as the James Webb Space Telescope. [3]
K2-155d is a super-Earth exoplanet with a radius 1.64 times that of Earth, near the transition zone between small rock-based and larger gaseous planets. [8] [3] [7] Climate models predict that it is located near its star's habitable zone and has an insolation 1.67 ± 0.38 (between 1.29 and 2.05) times that of Earth. [3] Its physical temperature is estimated to be 289 K (16 degrees Celsius or 61 degrees Fahrenheit). [4] Studies have shown that the planet would maintain a moderate surface temperature if its insolation is smaller than ~1.5 times that of Earth. [3]
K2-155d is one of three known planets in the system orbiting K2-155, a red dwarf star located 62.3 parsecs (203 ly) from Earth. [3] Its parent star has 88% less volume than the Sun. [9] K2-155d orbits its star with a 40.7 day period, but as the planet is tidally locked the same side always faces its sun. [5] K2-155d has an orbital radius of 0.1886 AU [8] and studies suggest that the planet has a low orbital eccentricity. [10]
K2-155d has been labeled a potentially habitable planet that may be able to harbor liquid water. [7] [5] A three-dimensional climate simulation was used to confirm the possibility of the existence of water. [5] However, its discoverer Teruyuki Hirano was cautious about the findings, stating that they do not guarantee K2-155d is habitable, as the ranges in its orbit and temperature allow the possibility of it being outside the habitable zone. [7] Factors such as the absence of solar flares could also decide if K2-155d is habitable. [5]