Confirmed Exoplanet Discovered 2021

KMT-2019-BLG-0371L b

A gas giant orbiting the unknown KMT-2019-BLG-0371L, located approximately 22,863.5 light-years from Earth.

Key parameters at a glance

  • A radius of 12.60 Earth radii
  • A mass of 2,447.28 Earth masses
  • Surface gravity around 15.41 g
  • Semi-major axis 0.7900 AU
  • Distance from Earth 22,863.54 light-years
  • Earth Similarity Index 0.419
  • Travel time at Voyager 1 speed 403,198,428 years

KMT-2019-BLG-0371L b Planet Profile

Physical Specs

Radius
12.60 R⊕
Radius (Jupiter)
1.130 R♃
Mass
2,447.28 M⊕
Mass (Jupiter)
7.700 M♃
Density
6.72 g/cm³
Surface Gravity
15.41 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.419
HZ Position Unknown
Controversial No

Discovery

Year 2021
Method Microlensing
Facility KMTNet
Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#1179of 1771

top 66.5%

This planet

12.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth KMT-2019-BLG-0371L b Jupiter
Radius (R⊕)1.0012.6011.21
Mass (M⊕)1.002,447.28317.83
Density (g/cm³)5.516.721.33
Surface Gravity (g)1.0015.412.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 2,447.279 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 12.600 R⊕ · percentile 31 / cohort 1771
Mass 2,447.279 M⊕ · percentile 83 / cohort 1747
Distance 7,010.00 pc · percentile 98 / cohort 1759
ESI 0.419 · percentile 91 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
0.7900 AU
Eccentricity
Inclination
°

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

 

Insolation (S⊕)

Earth = 1.00

Earth Similarity (ESI)

0.419

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Kim et al. 2021

Instrument

18k Mosaic CCD camera

Publication

2021-07

Observation locale

Ground

Host System: KMT-2019-BLG-0371L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.090 M☉

Metallicity [Fe/H]

Distance
7,010.00 parsec
Light-years 22,863.54 ly
V-band magnitude
mag
Voyager-speed travel 403,198,428 yr

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