Confirmed Exoplanet Discovered 2026

KMT-2022-BLG-1551L b

A gas giant orbiting the unknown KMT-2022-BLG-1551L, located approximately 22,504.8 light-years from Earth.

Key parameters at a glance

  • A radius of 13.20 Earth radii
  • A mass of 940.77 Earth masses
  • Surface gravity around 5.40 g
  • Semi-major axis 2.2900 AU
  • Distance from Earth 22,504.76 light-years
  • Earth Similarity Index 0.395
  • Travel time at Voyager 1 speed 396,871,491 years

KMT-2022-BLG-1551L b Planet Profile

Physical Specs

Radius
13.20 R⊕
Radius (Jupiter)
1.170 R♃
Mass
940.77 M⊕
Mass (Jupiter)
2.960 M♃
Density
2.25 g/cm³
Surface Gravity
5.40 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.395
HZ Position Unknown
Controversial No

Discovery

Year 2026
Method Microlensing
Facility KMTNet
Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth KMT-2022-BLG-1551L b Jupiter
Radius (R⊕)1.0013.2011.21
Mass (M⊕)1.00940.77317.83
Density (g/cm³)5.512.251.33
Surface Gravity (g)1.005.402.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 940.772 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771
Mass 940.772 M⊕ · percentile 65 / cohort 1747
Distance 6,900.00 pc · percentile 97 / cohort 1759
ESI 0.395 · percentile 84 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
2.2900 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)

0.395

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2026

Instrument

18k Mosaic CCD camera

Publication

2026-02

Observation locale

Ground

Host System: KMT-2022-BLG-1551L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.540 M☉

Metallicity [Fe/H]

Distance
6,900.00 parsec
Light-years 22,504.76 ly
V-band magnitude
mag
Voyager-speed travel 396,871,491 yr

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