Key parameters at a glance

A radius of 4.05 Earth radii
A mass of 15.40 Earth masses
Surface gravity around 0.94 g
Semi-major axis 1.9000 AU
Distance from Earth 11,415.46 light-years
Earth Similarity Index 0.540
Travel time at Voyager 1 speed 201,311,626 years

Context from the literature

KMT-2022-BLG-0440L b is a Neptune-like exoplanet, located 11,415 light years away in the constellation of Sagittarius. It was discovered in 2023.

Excerpted from Wikipedia · full article

KMT-2022-BLG-0440L b Planet Profile

Physical Specs

Radius

4.05 R⊕

Radius (Jupiter)

0.361 R♃

Mass

15.40 M⊕

Mass (Jupiter)

0.048 M♃

Density

1.27 g/cm³

Surface Gravity

0.94 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.540

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Microlensing

Facility KMTNet

Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#560of 574

top 97.4%

This planet

4.05R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-1771 b 4.06 R⊕ TOI-1472 b 4.06 R⊕ Kepler-228 d 4.04 R⊕

Metric	Earth	KMT-2022-BLG-0440L b	Jupiter
Radius (R⊕)	1.00	4.05	11.21
Mass (M⊕)	1.00	15.40	317.83
Density (g/cm³)	5.51	1.27	1.33
Surface Gravity (g)	1.00	0.94	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	15.400 M⊕	Direct mass measurement (not derived).

Percentile among Neptune-like cohort

Radius 4.050 R⊕ · percentile 2 / cohort 574

Mass 15.400 M⊕ · percentile 8 / cohort 574

Distance 3,500.00 pc · percentile 92 / cohort 572

ESI 0.540 · percentile 98 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

1.9000 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)

0.540

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Zhang et al. 2023

Instrument

18k Mosaic CCD camera

Publication

2023-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at KMTNet (12 shown).

KMT-2016-BLG-1105L b · Super-Earth KMT-2017-BLG-1194L b · Super-Earth KMT-2019-BLG-1367L b · Super-Earth KMT-2019-BLG-1806L b · Sub-Neptune KMT-2017-BLG-1003L b · Sub-Neptune KMT-2017-BLG-0428L b · Sub-Neptune KMT-2019-BLG-1216L b · Neptune-like KMT-2021-BLG-0712L b · Neptune-like KMT-2019-BLG-0298L b · Gas Giant KMT-2021-BLG-1547L b · Gas Giant KMT-2021-BLG-1105L b · Gas Giant KMT-2021-BLG-0909L b · Gas Giant

Host System: KMT-2022-BLG-0440L

Spectral Class

Unknown

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.530 M☉

Metallicity [Fe/H]

—

Distance

3,500.00 parsec

Light-years 11,415.46 ly

V-band magnitude

— mag

Voyager-speed travel 201,311,626 yr

Wikipedia →

Similar Worlds

KMT-2019-BLG-0953L b

Neptune-like · Unknown

Radius 4.06 R⊕ · 23,483.2 ly

OGLE-2017-BLG-0448L b

Neptune-like · Unknown

Radius 4.08 R⊕ · 24,559.5 ly

OGLE-2018-BLG-0506L b

Neptune-like · Unknown

Radius 4.18 R⊕ · 18,264.7 ly

MOA-2011-BLG-262L b

Neptune-like · Unknown

Radius 4.29 R⊕ · 23,483.2 ly

KMT-2023-BLG-0830L b

Neptune-like · Unknown

Radius 4.41 R⊕ · 23,646.3 ly

OGLE-2018-BLG-1126L b

Neptune-like · Unknown

Radius 4.41 R⊕ · 18,590.9 ly

Explore Related Categories

Neptune-like Planets Microlensing Discoveries KMTNet Mission