Key parameters at a glance

A radius of 3.21 Earth radii
A mass of 10.40 Earth masses
Surface gravity around 1.01 g
An orbital period of 2,800.000 days
Semi-major axis 3.2000 AU
Distance from Earth 9,915.14 light-years
Earth Similarity Index 0.617
Travel time at Voyager 1 speed 174,853,526 years

MOA-2009-BLG-266L b Planet Profile

Physical Specs

Radius

3.21 R⊕

Radius (Jupiter)

0.286 R♃

Mass

10.40 M⊕

Mass (Jupiter)

0.033 M♃

Density

1.73 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.617

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Microlensing

Facility MOA

Telescope 1.8 m MOA Telescope

Size rank in cohort

Rank by radius

#339of 1978

top 17.1%

This planet

3.21R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-483 b 3.21 R⊕ Kepler-782 b 3.21 R⊕ TOI-4155 b 3.21 R⊕

Metric	Earth	MOA-2009-BLG-266L b	Jupiter
Radius (R⊕)	1.00	3.21	11.21
Mass (M⊕)	1.00	10.40	317.83
Density (g/cm³)	5.51	1.73	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	10.400 M⊕	Direct mass measurement (not derived).

Percentile among Sub-Neptune cohort

Radius 3.210 R⊕ · percentile 83 / cohort 1978

Mass 10.400 M⊕ · percentile 76 / cohort 1978

Orbital period 2,800.00 d · percentile 100 / cohort 1946

Distance 3,040.00 pc · percentile 99 / cohort 1975

ESI 0.617 · percentile 84 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2,800.000 days

Semi-major axis

3.2000 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts about 7.67 Earth years at a mean orbital distance of 3.2000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.617

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Muraki et al. 2011

Instrument

MOA CCD Array

Publication

2011-11

Observation locale

Ground

Host System: MOA-2009-BLG-266L

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.560 M☉

Metallicity [Fe/H]

—

Distance

3,040.00 parsec

Light-years 9,915.14 ly

V-band magnitude

— mag

Voyager-speed travel 174,853,526 yr

Similar Worlds

KMT-2019-BLG-0842L b

Sub-Neptune · Unknown

Radius 3.19 R⊕ · 10,828.4 ly

KMT-2021-BLG-2609L b

Sub-Neptune · Unknown

Radius 3.17 R⊕ · 24,396.5 ly

MOA-2020-BLG-135L b

Sub-Neptune · Unknown

Radius 3.37 R⊕ · 25,766.3 ly

KMT-2019-BLG-0253L b

Sub-Neptune · Unknown

Radius 2.99 R⊕ · 15,981.6 ly

MOA-2010-BLG-328L b

Sub-Neptune · Unknown

Radius 2.99 R⊕ · 2,641.9 ly

OGLE-2017-BLG-0482L b

Sub-Neptune · Unknown

Radius 2.95 R⊕ · 18,917.0 ly

Explore Related Categories

Sub-Neptune Planets Microlensing Discoveries MOA Mission