Key parameters at a glance

A radius of 2.34 Earth radii
A mass of 6.06 Earth masses
Surface gravity around 1.11 g
Semi-major axis 1.3050 AU
Distance from Earth 21,868.76 light-years
Earth Similarity Index 0.728
Travel time at Voyager 1 speed 385,655,558 years

KMT-2018-BLG-1025L b Planet Profile

Physical Specs

Radius

2.34 R⊕

Radius (Jupiter)

0.208 R♃

Mass

6.06 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.60 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.728

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Microlensing

Facility KMTNet

Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#1429of 1978

top 72.2%

This planet

2.34R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-246 b 2.34 R⊕ Kepler-275 b 2.34 R⊕ Kepler-338 c 2.34 R⊕

Metric	Earth	KMT-2018-BLG-1025L b	Jupiter
Radius (R⊕)	1.00	2.34	11.21
Mass (M⊕)	1.00	6.06	317.83
Density (g/cm³)	5.51	2.60	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6.059 M⊕	Direct mass measurement (not derived).

Percentile among Sub-Neptune cohort

Radius 2.340 R⊕ · percentile 27 / cohort 1978

Mass 6.059 M⊕ · percentile 26 / cohort 1978

Distance 6,705.00 pc · percentile 99 / cohort 1975

ESI 0.728 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

1.3050 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)

0.728

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2021

Instrument

18k Mosaic CCD camera

Publication

2021-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at KMTNet (11 shown).

KMT-2020-BLG-0414L b · Rocky Terrestrial OGLE-2019-BLG-1053L b · Super-Earth KMT-2021-BLG-0322L b · Gas Giant KMT-2019-BLG-0371L b · Gas Giant KMT-2019-BLG-1715L b · Gas Giant KMT-2018-BLG-1976L b · Gas Giant KMT-2017-BLG-2509L b · Gas Giant KMT-2018-BLG-1996L b · Gas Giant KMT-2018-BLG-1743L b · Gas Giant KMT-2016-BLG-2605L b · Gas Giant KMT-2020-BLG-0414L c · Gas Giant

Host System: KMT-2018-BLG-1025L

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.219 M☉

Metallicity [Fe/H]

—

Distance

6,705.00 parsec

Light-years 21,868.76 ly

V-band magnitude

— mag

Voyager-speed travel 385,655,558 yr

Similar Worlds

OGLE-2018-BLG-0532L b

Sub-Neptune · Unknown

Radius 2.37 R⊕ · 2,521.2 ly

OGLE-2018-BLG-0977L b

Sub-Neptune · Unknown

Radius 2.41 R⊕ · 21,200.1 ly

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

KMT-2017-BLG-0428L b

Sub-Neptune · Unknown

Radius 2.23 R⊕ · 17,612.4 ly

KMT-2018-BLG-1988L b

Sub-Neptune · Unknown

Radius 2.22 R⊕ · 13,535.5 ly

Explore Related Categories

Sub-Neptune Planets Microlensing Discoveries KMTNet Mission