Planet HD 203030 Ab

Detailed information about planet HD 203030 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HD 203030 Ab

Planet Status

Confirmed

Discovered in

2017

Publication Status

—

Update

2025-03-30

Mass

11.0 (\begin{matrix} + 4.0 \\ - 4.0 \end{matrix})

M_J 1 publication

The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass

Mass*sin(i)

—

Semi-Major Axis

487.0 AU 1 publication

HD 203030B: An Unusually Cool Young Substellar Companion near the L/T Transition

Orbital Period

—

Eccentricity

—

Angular distance

—

ω

—

T_peri

—

Radius

1.3 (\begin{matrix} + 0.06 \\ - 0.04 \end{matrix})

R_J 1 publication

The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass

Inclination

—

Detection Method

Imaging

Mass Meas. Method

Spectrum

Radius Meas. Method

Theoretical

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

—

Calculated temperature

—

Measured temperature

1040.0 K 1 publication

The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

V457 Vul b, HIP 105232 b

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference
H2O
H2O	Measurements	Detected				2019 - MILES-PAEZ P.

It is an L7.5+/-0.5 brown dwarf.

No link

Star

Name

HD 203030 A

Distance

39.25 (\pm 0.095)

pc 1 publication

The Revised TESS Input Catalog and Candidate Target List

Spectral type

G8V

Apparent magnitude V

8.43

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

Mass

0.94 (\pm 0.126)

M_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Age

0.25 (\begin{matrix} + 0.07 \\ - 0.07 \end{matrix})

Gyr 2 publications

The Brown Dwarf Kinematics Project. II. Details on Nine Wide Common Proper Motion Very Low Mass Companions to Nearby Stars
The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass

Effective temperature

5418.3 (\pm 138.58)

K 1 publication

The Revised TESS Input Catalog and Candidate Target List

Radius

0.875 (\pm 0.0524)

R_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Metallicity [Fe/H]

—

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

21:18:58.0

Dec₂₀₀₀

+26:13:50.0

Alternate Names

V457 Vul

Gonzalez-Payo et al. (2024) report Gaia DR3 1846991350676057856 as M4 dwarf companion star 1,700 arcseconds away from HD 203030 (66,725 AUs at 33 pc).

No link

Simbad
Most recent references (ADS)

Planet HD 203030 Ab

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 1 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Planet HD 203030 Ab

Planet

Basic informations 30 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 1 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 17 parameters

Planetary system 1 planet

Remarks Some remarks

Other web pages No page

More data 2 references

Related publications

Multiplicity of stars with planets in the solar neighbourhood

A Mid-infrared Study of Directly Imaged Planetary-mass Companions Using Archival Spitzer/IRAC Images

Host star metallicity of directly imaged wide-orbit planets: implications for planet formation

Cloud Atlas: Variability in and out of the Water Band in the Planetary-mass HD 203030B Points to Cloud Sedimentation in Low-gravity L Dwarfs

The Revised TESS Input Catalog and Candidate Target List

The Prototypical Young L/T-Transition Dwarf HD 203030B Likely Has Planetary Mass

The Brown Dwarf Kinematics Project. II. Details on Nine Wide Common Proper Motion Very Low Mass Companions to Nearby Stars

HD 203030B: An Unusually Cool Young Substellar Companion near the L/T Transition