Planet TWA 28

Detailed information about planet TWA 28 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

TWA 28

Planet Status

Confirmed

Discovered in

2003

Update

2024-08-21

Mass

25.3 (\begin{matrix} + 10.0 \\ - 4.4 \end{matrix})

M_J 3 publications

The Gaia ultracool dwarf sample - V: the ultracool dwarf companion catalogue
The ESO SupJup Survey II: The 12C/13C ratios of three young brown dwarfs with CRIRES+
Uniform Forward-modeling Analysis of Ultracool Dwarfs. III. Late-M and L Dwarfs in Young Moving Groups, the Pleiades, and the Hyades

Mass*sin(i)

—

Semi-Major Axis

—

Orbital Period

—

Eccentricity

—

ω

—

T_peri

—

Radius

2.738 (\begin{matrix} + 0.038 \\ - 0.037 \end{matrix})

R_J 1 publication

Uniform Forward-modeling Analysis of Ultracool Dwarfs. III. Late-M and L Dwarfs in Young Moving Groups, the Pleiades, and the Hyades

Inclination

—

Detection Method

Imaging, Astrometry

Mass Meas. Method

Astrometry

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

2626.0 (\pm 50.0)

K 1 publication

Uniform Forward-modeling Analysis of Ultracool Dwarfs. III. Late-M and L Dwarfs in Young Moving Groups, the Pleiades, and the Hyades

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

SSSPM J1102-3431, 2MASS J11020983-3430355

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Reference
Al
Al	Measurements	Detected	2024 - MANJAVACAS E.
Ca
Ca	Measurements	Detected	2024 - MANJAVACAS E.
CO
CO	Measurements	Detected	2024 - MANJAVACAS E.
Fe
Fe	Measurements	Detected	2024 - MANJAVACAS E.
H2O
H2O	Measurements	Detected	2024 - MANJAVACAS E.
HF
HF	Measurements	Detected	2024 - MANJAVACAS E.
K
K	Measurements	Detected	2024 - MANJAVACAS E.
Mg
Mg	Measurements	Detected	2024 - MANJAVACAS E.
Na
Na	Measurements	Detected	2024 - MANJAVACAS E.
Ti
Ti	Measurements	Detected	2024 - MANJAVACAS E.

Manjavacas et al. (2024): Spectral type: M9.0 or M8.5γ, L=10^-2.47 L_{Sol. Age: 10 ± 3 Myrs.

The spectrum of TWA 28 is best reproduced using a model with Teff of 2577 K, a surface gravity (log g) of 4.0, a radius (R) of 2.54 R_Jup, and a mass of 26.0 M_Jup.

TWA 28 shows a near-infrared excess from ∼2.5 μm and longer, supporting the existence of a circumstellar disk as reported by Venuti et al. (2019).}