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

Publication Status

Published in a refereed paper

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

—

Angular distance

—

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).}