Key parameters at a glance
- A radius of 5.18 Earth radii
- A mass of 23.40 Earth masses
- Surface gravity around 0.87 g
- Semi-major axis 1.1000 AU
- Distance from Earth 25,114.01 light-years
- Earth Similarity Index 0.466
- Travel time at Voyager 1 speed 442,885,577 years
Context from the literature
MOA-2008-BLG-310Lb is an extrasolar planet which orbits probably the late K-type star MOA-2008-BLG-310L, located at least 20000 light years away in the constellation Scorpius. This planet has mass 23% of Jupiter or 77% of Saturn and orbits at 1.25 AU from the star. This planet was discovered by using the gravitational microlensing method on August 4, 2009. As it is typical for exoplanets detected by microlensing method, the orbital period and eccentricity are not determined.
Excerpted from Wikipedia · full article
MOA-2008-BLG-310L b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#361of 574
top 62.7%
This planet
5.18R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | MOA-2008-BLG-310L b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.18 | 11.21 |
| Mass (M⊕) | 1.00 | 23.40 | 317.83 |
| Density (g/cm³) | 5.51 | 0.93 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.87 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 23.400 M⊕ | Direct mass measurement (not derived). |
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
Orbital period for this planet has not yet been measured.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.466
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Janczak et al. 2010Instrument
MOA CCD Array
Publication
2010-03
Observation locale
Ground
Host System: MOA-2008-BLG-310L
Spectral Class
Unknown
Effective Temperature
—
Estimated Age
—
Stellar Radius
—
Stellar Mass
0.210 M☉
Metallicity [Fe/H]
—
Similar Worlds
KMT-2017-BLG-1057L b
Neptune-like · Unknown
Radius 5.19 R⊕ · 21,200.1 ly
KMT-2021-BLG-2294L b
Neptune-like · Unknown
Radius 5.02 R⊕ · 22,178.6 ly
KMT-2021-BLG-0736L b
Neptune-like · Unknown
Radius 4.86 R⊕ · 22,830.9 ly
OGLE-2015-BLG-0966L b
Neptune-like · Unknown
Radius 4.86 R⊕ · 10,763.1 ly
OGLE-2018-BLG-0516L b
Neptune-like · Unknown
Radius 4.73 R⊕ · 22,830.9 ly
OGLE-2007-BLG-368L b
Neptune-like · Unknown
Radius 4.72 R⊕ · 19,243.2 ly