KMT-2022-BLG-0440L b

KMT-2022 BLG-0440L b

Discovery[1]
Discovery date	2023
Detection method	Microlensing
Orbital characteristics[1]
Semi-major axis	1.9±0.7 AU
Orbital period (sidereal)	3.6 yrs
Star	KMT-2022-BLG-0440
Physical characteristics[1]
Mass	0.0485+0.0302 −0.0223 MJ

KMT-2022-BLG-0440L b is a Neptune-like exoplanet, located 11,415 light years away in the constellation of Sagittarius. It was discovered in 2023.[2]

Characteristics

Mass and radius

KMT-2002-BLG-0440L b was discovered by the gravitational microlensing method. This exoplanet's mass is 0.0485+0.302
−0.0223 M_J or 15.4 Earth mass. The exoplanet has a planet radius of 0.361 times that of Jupiter and its orbital radius is 1.9 AU.[2]

Orbit

KMT-2022-BLG-0440L b has a longer orbital period than Earth. The exoplanet has an orbital period of 3.6 years, just like KIC 5951458 b. KMT-2022-BLG-0440L b has a semi-major axis of 1.9±0.7 AU.

Host star

The host star of KMT-2022-BLG-0440L b is KMT-2022-BLG-0440L.

The star type is currently unknown and is not visible with the unaided eye from Earth. The star has a stellar mass of 0.5300 and has 0.53+31
−26 M_☉.

See also

• List of exoplanets
• List of exoplanets discovered in 2023
• Gravitational microlensing

References

1. Zhang, Jiyuan; et al. (2023), "KMT-2022-BLG-0440Lb: A new q < 10−4 microlensing planet with the central-resonant caustic degeneracy broken", Monthly Notices of the Royal Astronomical Society, 522 (4): 6055–6069, arXiv:2301.06779, doi:10.1093/mnras/stad1398
2. "The Extrasolar Planet Encyclopaedia — KMT-2022-BLG-0440L b". Extrasolar Planets Encyclopaedia. 1995. Retrieved 2023-01-19.