Planet J0438

Detailed information about planet J0438 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

J0438

Planet Status

Confirmed

Discovered in

1999

Publication Status

—

Update

2025-10-24

Mass

50.0

M_J 1 publication

MINDS: The very low-mass star and brown dwarf sample -- Hidden water in carbon-dominated protoplanetary disks

Mass*sin(i)

—

Semi-Major Axis

—

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

—

Inclination

—

Detection Method

Imaging

Mass Meas. Method

Spectrum

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

2838.0 K 1 publication

MINDS. Anatomy of a water-rich, inclined, brown dwarf disk: lack of abundant hydrocarbons

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

ITG 3, 2MASS J04381486+2611399

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Reference
Ar+
Ar+	Measurements	Detected	2025 - PEROTTI G.
C2H2
C2H2	Measurements	Detected	2025 - ARABHAVI A.
CO
CO	Measurements	Detected	2025 - PEROTTI G.
CO2
CO2	Measurements	Detected	2025 - PEROTTI G.
H2
H2	Measurements	Detected	2025 - PEROTTI G.
H2O
H2O	Measurements	Detected	2025 - ARABHAVI A.
HCN
HCN	Measurements	Detected	2025 - PEROTTI G.
Ne+
Ne+	Measurements	Detected	2025 - PEROTTI G.

Spectral type M7.25. Possible physical association to proto-brown dwarf GM Tau 2.38 arcminutes away (23,842 AUs at 140 pc).
The brown dwarf is surrounded by a 40 AU-wide disk inclined by 67-71° and rich in molecular species. However CO emission is detect up to 400 AUs away.

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