Planet ROXs 12 Ab

Detailed information about planet ROXs 12 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

ROXs 12 Ab

Planet Status

Confirmed

Discovered in

2013

Publication Status

Published in a refereed paper

Update

2025-08-17

Mass

19.0 (\pm 5.0)

M_J 2 publications

Are these planets or brown dwarfs? Broadly solar compositions from high-resolution atmospheric retrievals of ~10-30 M_Jup companions
Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Mass*sin(i)

—

Semi-Major Axis

210.0 (\pm 20.0)

AU 1 publication

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

2.2 (\pm 0.35)

R_J 1 publication

Are these planets or brown dwarfs? Broadly solar compositions from high-resolution atmospheric retrievals of ~10-30 M_Jup companions

Inclination

—

Detection Method

Imaging

Mass Meas. Method

Spectrum

Radius Meas. Method

Flux

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

3100.0 (\begin{matrix} + 400.0 \\ - 500.0 \end{matrix})

K 1 publication

ALMA 0.88 mm Survey of Disks around Planetary-mass Companions

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

ROXs 12 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type L0±2, although calculated temperature provided by Wu et al. (2020) suggests a spectral classification as early as M6 at least.

No link

Star

Name

ROXs 12 A

Distance

120.0 pc 1 publication

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Spectral type

M0V

Apparent magnitude V

15.5

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.87 (\pm 0.08)

M_Sun 1 publication

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Age

0.0076 (\begin{matrix} + 0.0025 \\ - 0.0041 \end{matrix})

Gyr 1 publication

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Effective temperature

3850.0 (\begin{matrix} + 70.0 \\ - 100.0 \end{matrix})

K 1 publication

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Radius

—

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

16:26:28.0

Dec₂₀₀₀

-25:26:47.7

Alternate Names

RAT 6 A, EPIC 203640875

An M dwarf companion star (WSB 32 or 2MASS J16262774-2527247, spT M1V) lies 5095 AUs away (Bowler et al. 2017, Michel & Mugrauer 2021).

No link

Simbad
Most recent references (ADS)

Planet ROXs 12 Ab

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Planet ROXs 12 Ab

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

Are these planets or brown dwarfs? Broadly solar compositions from high-resolution atmospheric retrievals of ~10-30 MJup companions

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Host star metallicity of directly imaged wide-orbit planets: implications for planet formation

ALMA 0.88 mm Survey of Disks around Planetary-mass Companions

The Young Substellar Companion ROXs 12 B: Near-Infrared Spectrum, System Architecture, and Spin-Orbit Misalignment

Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B

Are these planets or brown dwarfs? Broadly solar compositions from high-resolution atmospheric retrievals of ~10-30 M_Jup companions