Planet HD 18757 Ab

Detailed information about planet HD 18757 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HD 18757 Ab

Planet Status

Confirmed

Discovered in

2016

Update

2024-06-26

Mass

35.2 (\pm 1.2)

M_J

Mass*sin(i)

35.2 (\pm 1.2)

M_J 1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

Semi-Major Axis

22.0 (\pm 2.3)

AU 1 publication

Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc

Orbital Period

39785.0 (\begin{matrix} + 6570.0 \\ - 5840.0 \end{matrix})

day 1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

Eccentricity

0.943 (\pm 0.007)

1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

ω

44.0 (\begin{matrix} + 0.5 \\ - 0.4 \end{matrix})

deg 1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

T_peri

—

Radius

—

Inclination

—

Detection Method

Radial Velocity, Astrometry

Mass Meas. Method

Radial Velocity

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

665.8 (\begin{matrix} + 5.9 \\ - 5.3 \end{matrix})

m/s 1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

HD 18757 D

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

No remarks

No link

Star

Name

HD 18757 A

Distance

23.57 (\pm 0.01615)

pc 1 publication

The Revised TESS Input Catalog and Candidate Target List

Spectral type

G1.5V

Apparent magnitude V

6.64

Mass

1.02 (\pm 0.127)

M_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Age

11.4 (\pm 0.1)

Gyr 1 publication

The SOPHIE search for northern extrasolar planets. VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

Effective temperature

5736.59 (\pm 103.7)

K 1 publication

The Revised TESS Input Catalog and Candidate Target List

Radius

1.047 (\pm 0.044)

R_Sun 1 publication

The Revised TESS Input Catalog and Candidate Target List

Metallicity [Fe/H]

-0.283 (\pm 0.0167)

1 publication

The Revised TESS Input Catalog and Candidate Target List

Detected Disc

—

Magnetic Field

—

RA₂₀₀₀

03:04:09.6

Dec₂₀₀₀

+61:42:21.0

Alternate Names

KUI 11

HD 18757 has a visual companion star (KUI 11 B) 55.71 arcseconds away but TESS seems to discard a physical association. Hirsch et al. (2021) report a distinct companion labelled as "C", an M dwarf at very large separation (a = 6212.78 ± 4.51 AUs), plus a closer substellar companion labelled as "D".

No link