Confirmed Exoplanet Discovered 2021

KMT-2018-BLG-1976L b

A gas giant orbiting the unknown KMT-2018-BLG-1976L, located approximately 19,047.5 light-years from Earth.

Key parameters at a glance

  • A radius of 13.30 Earth radii
  • A mass of 705.58 Earth masses
  • Surface gravity around 3.99 g
  • Semi-major axis 3.5400 AU
  • Distance from Earth 19,047.51 light-years
  • Earth Similarity Index 0.375
  • Travel time at Voyager 1 speed 335,902,827 years

KMT-2018-BLG-1976L b Planet Profile

Physical Specs

Radius
13.30 R⊕
Radius (Jupiter)
1.190 R♃
Mass
705.58 M⊕
Mass (Jupiter)
2.220 M♃
Density
1.65 g/cm³
Surface Gravity
3.99 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.375
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

#793of 1771

top 44.7%

This planet

13.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth KMT-2018-BLG-1976L b Jupiter
Radius (R⊕)1.0013.3011.21
Mass (M⊕)1.00705.58317.83
Density (g/cm³)5.511.651.33
Surface Gravity (g)1.003.992.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 705.579 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 13.300 R⊕ · percentile 53 / cohort 1771
Mass 705.579 M⊕ · percentile 58 / cohort 1747
Distance 5,840.00 pc · percentile 94 / cohort 1759
ESI 0.375 · percentile 78 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
3.5400 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)

0.375

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2021

Instrument

18k Mosaic CCD camera

Publication

2021-06

Observation locale

Ground

Host System: KMT-2018-BLG-1976L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.650 M☉

Metallicity [Fe/H]

Distance
5,840.00 parsec
Light-years 19,047.51 ly
V-band magnitude
mag
Voyager-speed travel 335,902,827 yr

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