Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 830.00 Earth masses
Surface gravity around 4.76 g
An orbital period of 1,980.000 days
Semi-major axis 1.8000 AU
Distance from Earth 18,558.28 light-years
Earth Similarity Index 0.387
Travel time at Voyager 1 speed 327,275,186 years

MOA-2009-BLG-387L b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

830.00 M⊕

Mass (Jupiter)

2.600 M♃

Density

1.98 g/cm³

Surface Gravity

4.76 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.387

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Microlensing

Facility MOA

Telescope 1.8 m MOA Telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ HD 154857 c 13.20 R⊕

Metric	Earth	MOA-2009-BLG-387L b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	830.00	317.83
Density (g/cm³)	5.51	1.98	1.33
Surface Gravity (g)	1.00	4.76	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	830.000 M⊕	Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 830.000 M⊕ · percentile 62 / cohort 1747

Orbital period 1,980.00 d · percentile 85 / cohort 1533

Distance 5,690.00 pc · percentile 94 / cohort 1759

ESI 0.387 · percentile 82 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,980.000 days

Semi-major axis

1.8000 AU

Eccentricity

—

Inclination

52.00 °

Year Length

A year here lasts about 5.42 Earth years at a mean orbital distance of 1.8000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.387

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Batista et al. 2011

Instrument

MOA CCD Array

Publication

2011-05

Observation locale

Ground

Host System: MOA-2009-BLG-387L

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.190 M☉

Metallicity [Fe/H]

—

Distance

5,690.00 parsec

Light-years 18,558.28 ly

V-band magnitude

— mag

Voyager-speed travel 327,275,186 yr

Similar Worlds

MOA-2016-BLG-227L b

Gas Giant · Unknown

Radius 13.20 R⊕ · 21,200.1 ly

KMT-2016-BLG-2397L b

Gas Giant · Unknown

Radius 13.20 R⊕ · 15,916.4 ly

MOA-2013-BLG-220L b

Gas Giant · Unknown

Radius 13.20 R⊕ · 21,917.7 ly

KMT-2022-BLG-1818L c

Gas Giant · Unknown

Radius 13.20 R⊕ · 17,286.3 ly

OGLE-2012-BLG-0406L b

Gas Giant · Unknown

Radius 13.20 R⊕ · 16,210.0 ly

OGLE-2013-BLG-1761L b

Gas Giant · Unknown

Radius 13.20 R⊕ · 22,504.8 ly

Explore Related Categories

Gas Giant Planets Microlensing Discoveries MOA Mission