Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,141.00 Earth masses
Surface gravity around 6.75 g
Semi-major axis 3.4400 AU
Distance from Earth 13,861.63 light-years
Earth Similarity Index 0.411
Travel time at Voyager 1 speed 244,449,831 years

MOA-2022-BLG-091L b Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,141.00 M⊕

Mass (Jupiter)

3.590 M♃

Density

2.85 g/cm³

Surface Gravity

6.75 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.411

HZ Position Unknown

Controversial No

Discovery

Year 2025

Method Microlensing

Facility MOA

Telescope 1.8 m MOA Telescope

Size rank in cohort

Rank by radius

#960of 1771

top 54.2%

This planet

13.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 14810 b 13.00 R⊕ HD 47186 c 13.00 R⊕ WASP-107 c 13.00 R⊕

Metric	Earth	MOA-2022-BLG-091L b	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,141.00	317.83
Density (g/cm³)	5.51	2.85	1.33
Surface Gravity (g)	1.00	6.75	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,141.004 M⊕	Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,141.004 M⊕ · percentile 69 / cohort 1747

Distance 4,250.00 pc · percentile 92 / cohort 1759

ESI 0.411 · percentile 88 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

3.4400 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)

0.411

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2025

Instrument

MOA CCD Array

Publication

2025-07

Observation locale

Ground

Host System: MOA-2022-BLG-091L

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.750 M☉

Metallicity [Fe/H]

—

Distance

4,250.00 parsec

Light-years 13,861.63 ly

V-band magnitude

— mag

Voyager-speed travel 244,449,831 yr