Confirmed Exoplanet Discovered 2022

OGLE-2018-BLG-0977L b

A sub-neptune orbiting the unknown OGLE-2018-BLG-0977L, located approximately 21,200.1 light-years from Earth.

Key parameters at a glance

  • A radius of 2.41 Earth radii
  • A mass of 6.40 Earth masses
  • Surface gravity around 1.10 g
  • Semi-major axis 2.0000 AU
  • Distance from Earth 21,200.14 light-years
  • Earth Similarity Index 0.717
  • Travel time at Voyager 1 speed 373,864,448 years

OGLE-2018-BLG-0977L b Planet Profile

Physical Specs

Radius
2.41 R⊕
Radius (Jupiter)
0.215 R♃
Mass
6.40 M⊕
Mass (Jupiter)
0.020 M♃
Density
2.51 g/cm³
Surface Gravity
1.10 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.717
HZ Position Unknown
Controversial No

Discovery

Year 2022
Method Microlensing
Facility OGLE
Telescope 1.3 m Warsaw University Telescope

Size rank in cohort

Rank by radius

#1312of 1978

top 66.3%

This planet

2.41R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-143 b 2.41 R⊕ Kepler-343 b 2.41 R⊕ GJ 536 b 2.41 R⊕
Metric Earth OGLE-2018-BLG-0977L b Jupiter
Radius (R⊕)1.002.4111.21
Mass (M⊕)1.006.40317.83
Density (g/cm³)5.512.511.33
Surface Gravity (g)1.001.102.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 6.400 M⊕ Direct mass measurement (not derived).

Percentile among Sub-Neptune cohort

Radius 2.410 R⊕ · percentile 33 / cohort 1978
Mass 6.400 M⊕ · percentile 32 / cohort 1978
Distance 6,500.00 pc · percentile 99 / cohort 1975
ESI 0.717 · percentile 94 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
2.0000 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)

0.717

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Hwang et al. 2022

Instrument

OGLE CCD Array

Publication

2022-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at OGLE (12 shown).

OGLE-2018-BLG-0383L b · Sub-Neptune OGLE-2017-BLG-1691L b · Sub-Neptune OGLE-2018-BLG-0506L b · Neptune-like OGLE-2018-BLG-0516L b · Neptune-like OGLE-2019-BLG-0468L b · Gas Giant OGLE-2019-BLG-0362L b · Gas Giant OGLE-2019-BLG-1492L b · Neptune-like OGLE-2019-BLG-0468L c · Gas Giant OGLE-2019-BLG-1470L AB c · Gas Giant OGLE-2018-BLG-0298L b · Neptune-like OGLE-2018-BLG-1119L b · Gas Giant OGLE-2018-BLG-0799L b · Gas Giant

Host System: OGLE-2018-BLG-0977L

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.470 M☉

Metallicity [Fe/H]

—

Distance
6,500.00 parsec
Light-years 21,200.14 ly
V-band magnitude
— mag
Voyager-speed travel 373,864,448 yr

Similar Worlds

KMT-2017-BLG-0849L b

Sub-Neptune · Unknown

Radius 2.41 R⊕ · 23,548.5 ly

OGLE-2018-BLG-0383L b

Sub-Neptune · Unknown

Radius 2.41 R⊕ · 25,114.0 ly

OGLE-2018-BLG-0532L b

Sub-Neptune · Unknown

Radius 2.37 R⊕ · 2,521.2 ly

KMT-2018-BLG-1025L b

Sub-Neptune · Unknown

Radius 2.34 R⊕ · 21,868.8 ly

MOA-2012-BLG-505L b

Sub-Neptune · Unknown

Radius 2.48 R⊕ · 23,515.8 ly

KMT-2024-BLG-2059L b

Sub-Neptune · Unknown

Radius 2.54 R⊕ · 19,797.7 ly

Explore Related Categories

Sub-Neptune Planets Microlensing Discoveries OGLE Mission