Key parameters at a glance

A radius of 11.90 Earth radii
A mass of 8,657.65 Earth masses
Surface gravity around 61.14 g
Semi-major axis 0.8500 AU
Distance from Earth 23,515.85 light-years
Earth Similarity Index 0.254
Travel time at Voyager 1 speed 414,701,949 years

1 sibling around KMT-2024-BLG-0404L

KMT-2024-BLG-0404L b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
KMT-2024-BLG-0404L b this	Gas Giant	11.90	8,657.65	—	—	2025
KMT-2024-BLG-0404L c	Neptune-like	4.33	17.30	—	—	2025

KMT-2024-BLG-0404L b Planet Profile

Physical Specs

Radius

11.90 R⊕

Radius (Jupiter)

1.060 R♃

Mass

8,657.65 M⊕

Mass (Jupiter)

27.240 M♃

Density

28.20 g/cm³

Surface Gravity

61.14 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.254

HZ Position Unknown

Controversial No

Discovery

Year 2025

Method Microlensing

Facility KMTNet

Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#1526of 1771

top 86.1%

This planet

11.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

2MASS J22501512+2325342 b 11.90 R⊕ KMT-2020-BLG-0414L c 11.90 R⊕ DENIS-P J082303.1-491201 b 11.90 R⊕

Metric	Earth	KMT-2024-BLG-0404L b	Jupiter
Radius (R⊕)	1.00	11.90	11.21
Mass (M⊕)	1.00	8,657.65	317.83
Density (g/cm³)	5.51	28.20	1.33
Surface Gravity (g)	1.00	61.14	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	8,657.646 M⊕	Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 11.900 R⊕ · percentile 13 / cohort 1771

Mass 8,657.646 M⊕ · percentile 99 / cohort 1747

Distance 7,210.00 pc · percentile 99 / cohort 1759

ESI 0.254 · percentile 46 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

0.8500 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)

0.254

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2025

Instrument

18k Mosaic CCD camera

Publication

2025-08

Observation locale

Ground

Discovery cohort

Planets confirmed in 2025 at KMTNet (12 shown).

KMT-2024-BLG-2059L b · Sub-Neptune KMT-2024-BLG-2242L b · Sub-Neptune KMT-2023-BLG-1896L b · Neptune-like KMT-2024-BLG-0404L c · Neptune-like KMT-2023-BLG-0830L b · Neptune-like KMT-2024-BLG-1281L b · Neptune-like KMT-2021-BLG-0736L b · Neptune-like KMT-2023-BLG-0949L b · Gas Giant KMT-2023-BLG-0548L b · Gas Giant KMT-2017-BLG-2197L b · Gas Giant KMT-2024-BLG-1209L b · Gas Giant KMT-2022-BLG-1790L b · Gas Giant

Host System: KMT-2024-BLG-0404L

Spectral Class

M-type red dwarf

Effective Temperature

—

Estimated Age

—

Stellar Radius

—

Stellar Mass

0.090 M☉

Metallicity [Fe/H]

—

Distance

7,210.00 parsec

Light-years 23,515.85 ly

V-band magnitude

— mag

Voyager-speed travel 414,701,949 yr

Similar Worlds

HD 6860 b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 199.4 ly

2MASS J22501512+2325342 b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 186.7 ly

TOI-5293 A b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 529.1 ly

GJ 1148 b

Gas Giant · M-type red dwarf

Radius 11.90 R⊕ · 35.9 ly

TOI-6034 b

Gas Giant · M-type red dwarf

Radius 11.92 R⊕ · 384.8 ly

G 196-3 b

Gas Giant · M-type red dwarf

Radius 12.00 R⊕ · 71.1 ly

Explore Related Categories

Gas Giant Planets Microlensing Discoveries KMTNet Mission M-type red dwarf Hosts