L 98-59 b

From Wikipedia, the free encyclopedia
L 98-59 b
L98-59b.png
Artist's impression
Discovery
Discovery date2018[1]
Detection method
Transit[1]
Orbital characteristics
Semi-major axis
0.0227 AU[1]
Eccentricity0.09[1]
Orbital period (sidereal)
2.2532 d[1]
StarL 98-59
Physical characteristics
Mean radius
0.85 REarth[2]
Mass0.40 MEarth[2]
Temperature603 K (330°C)[3]

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]

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]

References[]

  1. ^ a b c d e "The Extrasolar Planet Encyclopaedia-L 98-59 b".{{cite web}}: CS1 maint: url-status (link)
  2. ^ a b c d e Demangeon, Oliver D. S.; Zapatero Osorio, M. R.; Alibert, Y.; Barros, S. C. C.; Adibekyan, V.; Tabernero, H. M.; et al. (July 2021). "A warm terrestrial planet with half the mass of Venus transiting a nearby star" (PDF). Astronomy & Astrophysics: 38. arXiv:2108.03323. doi:10.1051/0004-6361/202140728.
  3. ^ a b "Canicule ? Il fait 330 degrés sur la petite exoplanète découverte par le télescope spatial TESS". Numerama (in French). 2019-07-01. Retrieved 2019-07-30.
  4. ^ a b Garner, Rob (2019-06-24). "NASA's TESS Mission Finds Its Smallest Planet Yet". NASA. Retrieved 2019-06-29.
Stub icon

This extrasolar-planet-related article is a stub. You can help Wikipedia by .

  • v
  • t
Retrieved from ""