2MASS J12073346-3932539 b
Orbiting 2MASS J12073346-3932539
2MASS J12073346-3932539 b is an exoplanet orbiting the star 2MASS J12073346-3932539, discovered in 2004 using the Imaging method. It is a Jupiter-sized world.
Radius
15.69
Earth radii
Mass
1652.71
Earth masses
Distance
64.3
parsecs
Equilibrium Temp
1163
K
What these measurements mean
These comparisons use the reported catalog values. They are interpretations and calculations, not additional observations.
- Size in perspective
- At the reported radius, a spherical model gives about 3,860 times Earth's volume. This is the radius ratio cubed, not a mass comparison. The radius alone cannot establish whether this world has a rocky surface or a thick gaseous envelope.
- What the mass can tell you
- Mass describes how much material the planet contains. Inspect the published uncertainty and reference before combining it with a radius to estimate density. Catalog values can come from different studies.
- Temperature has limits
- Equilibrium temperature describes a model of absorbed and emitted energy, not a measured surface temperature. Atmosphere and reflectivity affect the interpretation. This value alone cannot establish liquid water, a habitable surface, or life.
Radius (Earth radii)
15.69
Mass (Earth masses)
1652.71
Measured
Equilibrium Temperature
1163 K
Parameter source: Zhang et al. 2025
Planet Mass (Earth masses)
1652.71+190.70−222.48
Planet Mass (Jupiter masses)
5.2000+0.6000−0.7000
Distance from Earth
64.3 pc (~210 ly)
Spectral Type
M8
Temperature
Unknown
Mass (Solar)
Unknown
Radius (Solar)
Unknown
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
181.8891°, -39.5484°
Discovery Method
Imaging
Discovery Year
2004
Source ID: 2MASS J12073346-3932539 b
2MASS J12073346-3932539 b orbits 2MASS J12073346-3932539 and was reported in 2004 and was detected with the Imaging method.
Published measurements list a radius of 15.69 Earth radii, a mass of 1,652.71 Earth masses, and an equilibrium temperature near 1,163 K.
Catalog data places the system at about 64.3 parsecs from Earth, a host star classified as M8, and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open 2MASS J12073346-3932539