astro.wikisort.org - Meteorite

L 98-59 b is an exoplanet having a size between that of the Earth and Mars, and a mass only half that of Venus.[2] It orbits L 98-59, a red dwarf 35 light-years away in the constellation Volans. There are at least 3 (possibly 4) other planets in the system: L 98-59 c, d, e, and the unconfirmed L 98-59 f.[2] Its discovery was announced on 27 June 2019 on the NASA website. It is the smallest planet discovered by TESS[4] and the lowest-mass planet whose mass has been measured using radial velocities.[2]

L 98-59 b

Artist's impression
Discovery
Discovery date	2018[1]
Detection method	Transit[1]
Orbital characteristics
Semi-major axis	0.0227 AU[1]
Eccentricity	0.09[1]
Orbital period (sidereal)	2.2532 d[1]
Star	L 98-59
Physical characteristics
Mean radius	0.85 REarth[2]
Mass	0.40 MEarth[2]
Temperature	603 K (330°C)[3]

Characteristics

L 98-59 b orbits in 2.25 days and stays so close to the star that it receives 22 times more energy than Earth receives from the Sun. There are 4 confirmed planets in the system but they are not in the habitable zone of the host star.[4] The temperature of the planet detected by TESS is 330 °C.[3] In 2022, transmision spectroscopy has indicanted the planet has either no atmosphere or opaque atmosphere with the high-altitude hazes.[5]

References

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