Planet WISE J1118+3125

Detailed information about planet WISE J1118+3125 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

WISE J1118+3125

Planet Status

Confirmed

Discovered in

2013

Update

2024-12-14

Mass

26.0 (\pm 12.0)

M_J 1 publication

A T8.5 Brown Dwarf Member of the ξ Ursae Majoris System

Mass*sin(i)

—

Semi-Major Axis

—

Orbital Period

—

Eccentricity

—

ω

—

T_peri

—

Radius

—

Inclination

—

Detection Method

Imaging

Mass Meas. Method

—

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

WISE J111838.70+312537.9, ksi UMa C, ksi UMa E

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Reference
CH4
CH4	Modeling	Detected	2013 - WRIGHT E.
H2O
H2O	Modeling	Detected	2013 - WRIGHT E.

Wright et al. (2013): WISE J1118+3125 exhibits common proper motion with the quadruple star system xi Ursae Majoris with a separation of 8.5' (4,100 AUs). The brown dwarf is labeled as either “xi UMa C” (SIMBAD entry) or “xi UMa E” and the whole system has an age of at least 2 Gyrs. Spectral type T8.5 ± 0.5.

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