Planet HD 18757 Ab

Detailed information about planet HD 18757 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

HD 18757 Ab

Mass

—

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

—

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

—

Surface gravity log(g/g_H)

—

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

No remarks

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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

Apparent magnitude I

—

Apparent magnitude J

—

Apparent magnitude H

—

Apparent magnitude K

—

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".

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