Exoplanet

KMT-2025-BLG-0121L b

Orbiting KMT-2025-BLG-0121L

Overview

KMT-2025-BLG-0121L b is an exoplanet orbiting the star KMT-2025-BLG-0121L, discovered in 2026 using the Microlensing method.

Key Measurements

Mass

2469.53

Earth masses

0500 M⊕

Distance

6200.0

parsecs

Nearby10,000 pc

Radius (Earth radii)

Unknown

Mass (Earth masses)

2469.53

Measured

Equilibrium Temperature

Unknown

Parameter source: Han et al. 2026

Semi-Major Axis

3.0500+0.4600−0.6600au

Planet Mass (Earth masses)

2469.53+1296.74−1284.03

Planet Mass (Jupiter masses)

7.7700+4.0800−4.0400

Distance from Earth

6200.0 pc (~20222 ly)

Spectral Type

Unknown

Temperature

Unknown

Mass (Solar)

0.61 M☉

Radius (Solar)

Unknown

Luminosity

Unknown

Planets in System

1

Stars in System

1

Coordinates (RA, Dec)

267.1584°, -23.9988°

Discovery Method

Microlensing

Discovery Year

2026

Data Sources
NASA Exoplanet Archive

Source ID: KMT-2025-BLG-0121L b

System Context

KMT-2025-BLG-0121L b orbits KMT-2025-BLG-0121L and was reported in 2026 and was detected with the Microlensing method.

Published measurements list a mass of 2,469.53 Earth masses.

Catalog data places the system at about 6,200 parsecs from Earth and 1 known planet in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open KMT-2025-BLG-0121L