Planet UX Tau Ac

Detailed information about planet UX Tau Ac and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

UX Tau Ac

Planet Status

Candidate

Discovered in

2020

Publication Status

Published in a refereed paper

Update

2025-08-23

Mass

3.02

M_J 1 publication

The Separation and Hα Contrasts of Massive Accreting Planets in the Gaps of Transitional Disks: Predicted Hα Protoplanet Yields for Adaptive Optics Surveys

Mass*sin(i)

—

Semi-Major Axis

24.67 AU 1 publication

The Separation and Hα Contrasts of Massive Accreting Planets in the Gaps of Transitional Disks: Predicted Hα Protoplanet Yields for Adaptive Optics Surveys

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

1.7

R_J 1 publication

The Separation and Hα Contrasts of Massive Accreting Planets in the Gaps of Transitional Disks: Predicted Hα Protoplanet Yields for Adaptive Optics Surveys

Inclination

—

Detection Method

Imaging

Mass Meas. Method

Theoretical

Radius Meas. Method

Theoretical

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

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Close (2020): planetary parameters inferred for at least one planet within protoplanetary disk. Orbital solution with two or three planets (m₂ = 6.04 M_Jup and m₃ = 1.51 M_Jup) are likewise possible (a₂ = 15.54 AUs and a₂ = 39.16 AUs).

No link

Star

Name

UX Tau A

Distance

147.0 (\pm 2.0)

pc 1 publication

Ongoing flyby in the young multiple system UX Tauri

Spectral type

K2Ve

Apparent magnitude V

11.1

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

1.4 (\pm 0.6)

M_Sun 4 publications

Ongoing flyby in the young multiple system UX Tauri
An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations
Tidal Interaction between the UX Tauri A/C Disk System Revealed by ALMA

Age

0.0015 (\pm 0.0005)

Gyr 2 publications

Ongoing flyby in the young multiple system UX Tauri
The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations

Effective temperature

4710.0 K 1 publication

The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations

Radius

1.74 R_Sun 1 publication

An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

04:30:04.0

Dec₂₀₀₀

+18:13:49.4

Alternate Names

HD 285846 A, HBC 43

Young multiple system including a K-type protostar with an M-type companion (UX Tau B, spT M2Ve) 5.8 arcseconds away (852 AUs at 147 pc), itself binary made of similar components (m_Ba = 0.5 M_Sol and m_Bb = 0.4 M_Sol) separated by about 0.1 arcseconds (~15 AUs at 147 pc). An additional component, UX Tau C, is generally assumed to be a very low mass star (m_C = 0.16 M_Sol) but actual mass range is between 40 and 100 M_Jup, hence within substellar domain.