Planet KPNO-Tau 5

Detailed information about planet KPNO-Tau 5 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

KPNO-Tau 5

Planet Status

Confirmed

Discovered in

2002

Publication Status

Published in a refereed paper

Update

2025-08-16

Mass

40.0

M_J 1 publication

Multiplicity and Optical Excess across the Substellar Boundary in Taurus

Mass*sin(i)

—

Semi-Major Axis

18180.0 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

129.88

arcsec

ω

—

T_peri

—

Radius

6.8

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

Flux

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

2955.0 K

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J04294568+2630468, HAT 6 (AB)b, ITO 13 (AB)b, DI Tau (ABC)b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type M7.5e. L = 0.031 L_Sol. Member of Taurus-Auriga star-forming region. Age 1-2 Myr.
Joncour et al. (2017) deem KPNO-Tau 5 to be gravitationally bound to DI-DH Tau multiple system 18,180 AUs away. KPNO-Tau 5 would hence be a circumternary brown dwarf orbiting both the DI Tau AB pair and the tertiary star DH Tau (hereby regarded as “DI Tau C”).

No link

Star

Name

DI Tau (AB)

Distance

137.35 (\pm 0.86)

pc 1 publication

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

Spectral type

M0Ve+M7V

Apparent magnitude V

13.6

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.95 (\begin{matrix} + 0.37 \\ - 0.35 \end{matrix})

M_Sun 1 publication

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

Age

0.0007 (\begin{matrix} + 0.0003 \\ - 0.0001 \end{matrix})

Gyr 1 publication

Chemical Links between a Young M-type T Tauri Star and Its Substellar Companion: Spectral Analysis and C/O Measurement of DH Tau A

Effective temperature

3900.0 (\begin{matrix} + 16.0 \\ - 73.0 \end{matrix})

K 1 publication

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

Radius

1.68 (\pm 0.04)

R_Sun 1 publication

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

04:29:42.5

Dec₂₀₀₀

+26:32:49.1

Alternate Names

HAT-6 A, ITO 13 A, HBC 39

Tang et al. (2023): young binary composed of a 0.82 ± 0.32 M_Sol primary and a 0.14_-0.04^+0.07 M_Sol secondary tracing a highly eccentric orbit (a = 10.6_-0.2^+5.5 AUs, e = 0.734_-0.026^+0.128, i = 81.2_-0.64^+27.6°). Secondary star’s parameters: r₂ = 1.11 ± 0.15 R_Sol and T₂ = 2868_-283⁺²²⁸ K.