 Artistic representation of asub-Neptune exoplanet. | |
| Discovery | |
|---|---|
| Discovered by | Dedrick et al. |
| Discovery date | 2020[1] |
| Radial velocity[1][2] | |
| Designations | |
| HD 97101 Ab,HIP 54646 b,[3]LHS 2367 b,G 119-60 b,TIC 9001920 b,WISEA J111105.67+302643.6 b[4] | |
| Orbital characteristics | |
| Periastron | 0.13 AU |
| Apoastron | 0.34 AU |
| 0.24±0.01 AU[5] | |
| Eccentricity | 0.45+0.19 −0.22[5] |
| 50.817+0.031 −0.03 d[5] | |
| 111°+36° −52°[5] | |
| Star | Gliese 414 A |
| Physical characteristics | |
| 2.95+1.11 −0.91 R🜨[5] | |
| Mass | >7.6+2.44 −2.19 M🜨[5] |
| Temperature | 308.6±33.5 K (35.5 °C (95.9 °F))[5][a] |
Gliese 414 Ab, also known asGJ 414 Ab, is asub-Neptuneexoplanet orbitingGliese 414 A, anorange dwarf located 39light-years from Earth, in the constellation Ursa Major.[4][note 1] It isat least 7.6 times more massive than theEarth and is 3 times larger, having adiameter of37600 km.[5] It orbits its host star at a distance of 0.24 astronomical units (36,000,000 km), completing one revolution every 51 days.[5] The distance of Gliese 414 A b from its star makes it to be located in the inner part of the optmistichabitable zone, and the planet has aequilibrium temperature of 35.5 °C.[5]
Gliese 414 Ab is classified as asub-Neptune planet. With a diameter of37600 km, it is about 3 times larger thanEarth, but 24% smaller thanNeptune.[5] Having aminimum mass of7.6 M🜨, it is likely that it is not arocky planet, but instead has anvolatile-rich envelope.[5] NASA Eyes on Exoplanets cites it as a Neptune-like planet.[2]
Gliese 414 Ab completes one orbit around its star every 51 days, being located at a distance of 0.24 astronomical units (36,000,000 km).[2] Its orbit is highlyeccentric (e = 0.45), which means that the distance from its star varies from 0.13 to 0.34 astronomical units(19,400,000 km to50,860,000 km).[5] The orbital variation of Gliese 414 Ab causes to occasionally be located within its star'shabitable zone, which has an inner limit of 0.21 AU according to a more optimistic model.[5][7] According to another model, the star's habitable zone is located from 0.37 to 0.7 AU.[5]
As it orbits close to thehabitable zone, it is a warm planet, having a surface temperature estimated at around 36 °C.[5][a] Themargin of error of 33.5 implies that the temperature can be as high as 69.1°C, and as low as 2°C.[5]
Gliese 414 Ab was discovered in 2020 by analyzingradial velocity data fromKeck'sHIRES instrument and theAutomated Planet Finder atLick Observatory, as well asphotometric data fromKELT.[3][8]
Its parent star, known asGliese 414 A, is anorange dwarf about 70% the size of the Sun.[9] In addition to Gliese 414 Ab, the star also hostsGliese 414 Ac, aSuper-Neptune orbiting at a distance 6 times greater, of 1.4AU.[9]
It also has ared dwarf companion, located at a distance of 408 AU from the main star.[3]
2020 in space | ||
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| Space probe launches  |
|   _on_Jul_14_2020_aligned_to_stars.jpg) |
| Impact events | ||
| Selected NEOs | ||
| Exoplanets |
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| Discoveries |
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| Comets | ||
| Space exploration |
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