Planet KPNO-Tau 9

Detailed information about planet KPNO-Tau 9 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

KPNO-Tau 9

Planet Status

Confirmed

Discovered in

2002

Publication Status

Published in a refereed paper

Update

2025-08-16

Mass

20.0

M_J 1 publication

Multiplicity and Optical Excess across the Substellar Boundary in Taurus

Mass*sin(i)

—

Semi-Major Axis

690.0 AU 1 publication

Multiplicity and clustering in Taurus star-forming region. I. Unexpected ultra-wide pairs of high-order multiplicity in Taurus

Orbital Period

—

Eccentricity

—

Angular distance

108.51

arcsec

ω

—

T_peri

—

Radius

2.2

R_J 1 publication

Multiplicity and Optical Excess across the Substellar Boundary in Taurus

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

2907.0 K

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J04355143+2249119, XEST08-049 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type M8.5. L = 0.003 L_Sol. Member of Taurus-Auriga star-forming region. Age 1-2 Myr.
Joncour et al. (2017) deem KPNO-Tau 9 to be gravitationally bound to protostar XEST08-049, which in turn would be the tertiary star of HQ Tau system lying 11,882 AUs away. KPNO-Tau 9 itself would be 12,571 AUs away from HQ Tau, turning out being part of a complex multiple system.

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