Planet KPNO-Tau 4

Detailed information about planet KPNO-Tau 4 and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

KPNO-Tau 4

Planet Status

Confirmed

Discovered in

2002

Publication Status

Published in a refereed paper

Update

2025-08-16

Mass

25.0 (\pm 5.0)

M_J 2 publications

Towards Precise Ages and Masses of Free Floating Planetary Mass Brown Dwarfs
Multiplicity and Optical Excess across the Substellar Boundary in Taurus

Mass*sin(i)

—

Semi-Major Axis

65694.0 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

469.36

arcsec

ω

—

T_peri

—

Radius

4.2

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

Flux

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

2350.0 (\pm 50.0)

K 1 publication

The Initial Mass Function in the Taurus Star-forming Region

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

2MASS J03534804+2349098, [BLH2002] KPNO-Tau 4, DG Tau (AB)b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Spectral type M9.5. L = 0.005 L_Sol. Member of Taurus-Auriga star-forming region. Age 1-2 Myr.
Joncour et al. (2017) deem KPNO-Tau 4 to be gravitationally bound to binary protostar DG Tauri lying 65,694 AUs away. KPNO-Tau 4 itself would be circumbinary companion in a likely triple system.

https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Cl*+Melotte+22+KPNO+4&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id

Star

Name

DG Tau

Distance

125.0 (\pm 2.0)

Spectral type

K6Ve

Apparent magnitude V

10.5

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.7 M_Sun 1 publication

PRODIGE - planet-forming disks in Taurus with NOEMA. I. Overview and first results for 12CO, 13CO, and C18O

Age

0.001 Gyr

Effective temperature

4000.0 K 1 publication

PRODIGE - planet-forming disks in Taurus with NOEMA. I. Overview and first results for 12CO, 13CO, and C18O

Radius

1.9 R_Sun 1 publication

The Evolution of the Inner Regions of Protoplanetary Disks

Metallicity [Fe/H]

-1.49 1 publication

Gaia Data Release 3. Summary of the content and survey properties

Detected Disc

Imaging

Magnetic Field

—

RA₂₀₀₀

04:27:04.7

Dec₂₀₀₀

+26:06:16.1

Alternate Names

LOO 5, KSA 19

Located in Taurus Molecular Cloud, DG Tau is likely part of a triple or quadruple system including companion stars DG Tau B (or 2MASS J04270370+2606067, spT dM) and IRAS 04248+2612 (spT dM) visually located 16.41 and 1055.6 arcseconds away respectively (2,050 and 131,950 AUs at 125 pc).

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