Confirmed Exoplanet Discovered 2004

2MASS J12073346-3932539 b

A gas giant orbiting the m-type red dwarf 2MASS J12073346-3932539, located approximately 209.7 light-years from Earth.

Key parameters at a glance

  • A radius of 15.69 Earth radii
  • A mass of 1,652.71 Earth masses
  • Surface gravity around 6.71 g
  • Semi-major axis 46.0000 AU
  • Equilibrium temperature 1,163 K (890 °C)
  • Distance from Earth 209.74 light-years
  • Earth Similarity Index 0.131
  • Travel time at Voyager 1 speed 3,698,842 years

2MASS J12073346-3932539 b Planet Profile

Physical Specs

Radius
15.69 R⊕
Radius (Jupiter)
1.400 R♃
Mass
1,652.71 M⊕
Mass (Jupiter)
5.200 M♃
Density
2.35 g/cm³
Surface Gravity
6.71 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.131
HZ Position Unknown
Controversial No

Discovery

Year 2004
Method Imaging
Facility Paranal Observatory
Telescope 8.2 m ESO VLT UT4 Yepun Telescope

Size rank in cohort

Rank by radius

#184of 1771

top 10.3%

This planet

15.69R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-1295 b 15.69 R⊕ HD 143811 AB b 15.69 R⊕ WASP-66 b 15.69 R⊕
Metric Earth 2MASS J12073346-3932539 b Jupiter
Radius (R⊕)1.0015.6911.21
Mass (M⊕)1.001,652.71317.83
Density (g/cm³)5.512.351.33
Surface Gravity (g)1.006.712.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 1,652.708 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 102076870

Gaia DR2

Gaia DR2 3459372646830687104

Gaia DR3

Gaia DR3 3459372646830687104

System

2MASS J12073346-3932539

Percentile among Gas Giant cohort

Radius 15.693 R⊕ · percentile 89 / cohort 1771
Mass 1,652.708 M⊕ · percentile 76 / cohort 1747
Distance 64.31 pc · percentile 27 / cohort 1759
ESI 0.131 · percentile 34 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
— days
Semi-major axis
46.0000 AU
Eccentricity
—
Inclination
— °

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

1,163K

(890 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.131

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Chauvin et al. 2004

Instrument

NACO Camera

Publication

2004-10

Observation locale

Ground

Host System: 2MASS J12073346-3932539

Spectral Class

M-type red dwarf

Effective Temperature

2,825 K — cooler than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.219 R☉

Stellar Mass

0.188 M☉

Metallicity [Fe/H]

—

Distance
64.31 parsec
Light-years 209.74 ly
V-band magnitude
20.15 mag
Voyager-speed travel 3,698,842 yr

Multi-band Host Photometry — 10 bands

8.120.220.15V17.41Gaia15.66TESS13.00J12.39H11.95K11.57W111.02W29.47W38.12W4

Astrometric Data

Parallax

15.524 mas

Total Proper Motion

68.332 mas/yr

PM Right Ascension

-64.08 mas/yr

PM Declination

-23.72 mas/yr

Galactic Cartesian (pc)

x = -0.771 · y = -0.025 · z = -0.637

Equatorial (J2000)

RA 181.88909° · Dec -39.54844°

Galactic ℓ, b

293.790° · 22.543°

Ecliptic λ, β

199.740° · -35.035°

HTM-20 index

1156286384

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