Key parameters at a glance

A radius of 12.10 Earth radii
A mass of 6,356.57 Earth masses
Surface gravity around 43.42 g
Semi-major axis 587.0000 AU
Equilibrium temperature 2,506 K (2233 °C)
Distance from Earth 328.97 light-years
Earth Similarity Index 0.044
Travel time at Voyager 1 speed 5,801,341 years

2MASS J11550485-7919108 b Planet Profile

Physical Specs

Radius

12.10 R⊕

Radius (Jupiter)

1.080 R♃

Mass

6,356.57 M⊕

Mass (Jupiter)

20.000 M♃

Density

19.70 g/cm³

Surface Gravity

43.42 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.044

HZ Position Unknown

Controversial No

Discovery

Year 2024

Method Imaging

Facility European Space Agency (ESA) Gaia Satellite

Telescope 1.45 m x 0.5 m Telescope

Size rank in cohort

Rank by radius

#1454of 1771

top 82.0%

This planet

12.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 62364 b 12.10 R⊕ HD 106515 A b 12.10 R⊕ BD+20 2457 b 12.10 R⊕

Metric	Earth	2MASS J11550485-7919108 b	Jupiter
Radius (R⊕)	1.00	12.10	11.21
Mass (M⊕)	1.00	6,356.57	317.83
Density (g/cm³)	5.51	19.70	1.33
Surface Gravity (g)	1.00	43.42	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	6,356.568 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 357014373

Gaia DR2

Gaia DR2 5199985216726016896

Gaia DR3

Gaia DR3 5199985216726016896

System

2MASS J11550485-7919108

Percentile among Gas Giant cohort

Radius 12.100 R⊕ · percentile 16 / cohort 1771

Mass 6,356.568 M⊕ · percentile 96 / cohort 1747

Distance 100.86 pc · percentile 35 / cohort 1759

ESI 0.044 · percentile 2 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

— days

Semi-major axis

587.0000 AU

Eccentricity

—

Inclination

— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

2,506K

(2233 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.044

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Michel & Mugrauer 2024

Instrument

Gaia CCD array

Publication

2024-01

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at European Space Agency (ESA) Gaia Satellite (7 shown).

Gaia22dkvL b · Gas Giant 2MASS J21252752-8138278 b · Gas Giant G 196-3 b · Gas Giant 2MASS J03590986+2009361 b · Gas Giant HIP 77900 b · Gas Giant ITG 15 b · Gas Giant 2MASS J11011926-7732383 b · Gas Giant

Host System: 2MASS J11550485-7919108

Spectral Class

M-type red dwarf

Effective Temperature

3,021 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.600 R☉

Stellar Mass

0.588 M☉

Metallicity [Fe/H]

—

Distance

100.86 parsec

Light-years 328.97 ly

V-band magnitude

16.96 mag

Voyager-speed travel 5,801,341 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.886 mas

Total Proper Motion

41.407 mas/yr

PM Right Ascension

-41.18 mas/yr

PM Declination

-4.34 mas/yr

Galactic Cartesian (pc)

x = -0.185 · y = 0.004 · z = -0.983

Equatorial (J2000)

RA 178.76916° · Dec -79.31976°

Galactic ℓ, b

300.231° · -16.745°

Ecliptic λ, β

244.426° · -64.578°

HTM-20 index

51986296

Similar Worlds

UCAC3 113-933 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 171.5 ly

HD 18438 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 731.1 ly

LP 261-75 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 110.7 ly

HD 41004 B b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 135.5 ly

Gaia-5 b

Gas Giant · M-type red dwarf

Radius 12.10 R⊕ · 134.3 ly

ROXs 12 b

Gas Giant · M-type red dwarf

Radius 12.20 R⊕ · 445.7 ly

Explore Related Categories

Gas Giant Planets Imaging Discoveries European Space Agency (ESA) Gaia Satellite Mission M-type red dwarf Hosts