Confirmed Exoplanet Discovered 2026

KMT-2024-BLG-2005L b

A neptune-like orbiting the unknown KMT-2024-BLG-2005L, located approximately 25,179.2 light-years from Earth.

Key parameters at a glance

  • A radius of 8.18 Earth radii
  • A mass of 50.85 Earth masses
  • Surface gravity around 0.76 g
  • Semi-major axis 1.1200 AU
  • Distance from Earth 25,179.24 light-years
  • Earth Similarity Index 0.349
  • Travel time at Voyager 1 speed 444,035,929 years

KMT-2024-BLG-2005L b Planet Profile

Physical Specs

Radius
8.18 R⊕
Radius (Jupiter)
0.729 R♃
Mass
50.85 M⊕
Mass (Jupiter)
0.160 M♃
Density
0.51 g/cm³
Surface Gravity
0.76 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.349
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

#144of 574

top 24.9%

This planet

8.18R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Metric Earth KMT-2024-BLG-2005L b Jupiter
Radius (R⊕)1.008.1811.21
Mass (M⊕)1.0050.85317.83
Density (g/cm³)5.510.511.33
Surface Gravity (g)1.000.762.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 50.853 M⊕ Direct mass measurement (not derived).

Percentile among Neptune-like cohort

Radius 8.180 R⊕ · percentile 74 / cohort 574
Mass 50.853 M⊕ · percentile 70 / cohort 574
Distance 7,720.00 pc · percentile 99 / cohort 572
ESI 0.349 · percentile 63 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
1.1200 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)

0.349

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2026

Instrument

18k Mosaic CCD camera

Publication

2026-03

Observation locale

Ground

Host System: KMT-2024-BLG-2005L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.120 M☉

Metallicity [Fe/H]

Distance
7,720.00 parsec
Light-years 25,179.24 ly
V-band magnitude
mag
Voyager-speed travel 444,035,929 yr

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