Confirmed Exoplanet Discovered 2025

OGLE-2015-BLG-1609L b

A gas giant orbiting the unknown OGLE-2015-BLG-1609L, located approximately 10,763.1 light-years from Earth.

Key parameters at a glance

  • A radius of 10.40 Earth radii
  • A mass of 76.28 Earth masses
  • Surface gravity around 0.71 g
  • Distance from Earth 10,763.15 light-years
  • Earth Similarity Index 0.298
  • Travel time at Voyager 1 speed 189,808,104 years

OGLE-2015-BLG-1609L b Planet Profile

Physical Specs

Radius
10.40 R⊕
Radius (Jupiter)
0.926 R♃
Mass
76.28 M⊕
Mass (Jupiter)
0.240 M♃
Density
0.37 g/cm³
Surface Gravity
0.71 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.298
HZ Position Unknown
Controversial No

Discovery

Year 2025
Method Microlensing
Facility OGLE
Telescope 1.3 m Warsaw University Telescope

Size rank in cohort

Rank by radius

#1739of 1771

top 98.1%

This planet

10.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth OGLE-2015-BLG-1609L b Jupiter
Radius (R⊕)1.0010.4011.21
Mass (M⊕)1.0076.28317.83
Density (g/cm³)5.510.371.33
Surface Gravity (g)1.000.712.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 76.279 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 10.400 R⊕ · percentile 2 / cohort 1771
Mass 76.279 M⊕ · percentile 2 / cohort 1747
Distance 3,300.00 pc · percentile 91 / cohort 1759
ESI 0.298 · percentile 58 / cohort 1771

Orbit & Habitability

Eq. Temperature

 

Insolation (S⊕)

Earth = 1.00

Earth Similarity (ESI)

0.298

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mr & Oacute Z et al. 2025

Instrument

OGLE CCD Array

Publication

2025-06

Observation locale

Ground

Host System: OGLE-2015-BLG-1609L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.170 M☉

Metallicity [Fe/H]

Distance
3,300.00 parsec
Light-years 10,763.15 ly
V-band magnitude
mag
Voyager-speed travel 189,808,104 yr

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