Planet 82 Eri e

Detailed information about planet 82 Eri e and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name

82 Eri e

Planet Status

Confirmed

Discovered in

2017

Update

2024-05-28

Mass

0.01501 (\begin{matrix} + 0.00302 \\ - 0.00271 \end{matrix})

M_J

Mass*sin(i)

0.01501 (\begin{matrix} + 0.00302 \\ - 0.00271 \end{matrix})

M_J 2 publications

An Integrative Analysis of the Rich Planetary System of the Nearby Star e Eridani: Ideal Targets For Exoplanet Imaging and Biosignature Searches
Evidence for at least three planet candidates orbiting HD20794

Semi-Major Axis

0.509 (\pm 0.006)

AU 1 publication

Evidence for at least three planet candidates orbiting HD20794

Orbital Period

147.02 (\begin{matrix} + 1.43 \\ - 0.91 \end{matrix})

day 1 publication

Evidence for at least three planet candidates orbiting HD20794

Eccentricity

0.29 (\begin{matrix} + 0.14 \\ - 0.17 \end{matrix})

1 publication

Evidence for at least three planet candidates orbiting HD20794

ω

268.0 (\begin{matrix} + 47.0 \\ - 32.0 \end{matrix})

deg 1 publication

Evidence for at least three planet candidates orbiting HD20794

T_peri

—

Radius

—

Inclination

—

Detection Method

Radial Velocity

Mass Meas. Method

Radial Velocity

Radius Meas. Method

—

Primary transit

—

Secondary transit

—

λ

—

Impact Parameter b

—

Time V_r=0

—

Velocity Semiamplitude K

0.69 (\begin{matrix} + 0.15 \\ - 0.13 \end{matrix})

m/s 1 publication

Evidence for at least three planet candidates orbiting HD20794

Calculated temperature

—

Measured temperature

—

Hottest point longitude

—

Geometric albedo

—

Surface gravity log(g/g_H)

—

Alternate Names

e Eri e, HD 20794 e

Data Source	Type	Result Value	Result Figure	Notes	Reference

Molecule	Data Source	Type	Result Value	Result Figure	Notes	Reference

Feng et al. 2017 : With "differential radial velocities" method, they identify four signals at 18, 89, 147 and 330 d and weak evidence for a 43 d and a 11.9 d signals.

No link

Star

Name

82 Eri

Distance

6.06 pc 1 publication

The HARPS search for Earth-like planets in the habitable zone. I. Very low-mass planets around HD 20794, HD 85512, and HD 192310

Spectral type

G8V

Apparent magnitude V

4.26

Mass

0.813 (\begin{matrix} + 0.018 \\ - 0.012 \end{matrix})

M_Sun 1 publication

Evidence for at least three planet candidates orbiting HD20794

Age

14.0 (\begin{matrix} + 6.0 \\ - 5.0 \end{matrix})

Gyr 1 publication

Characteristics of the closest known G-type exoplanet host 82 Eri

Effective temperature

5490.0 (\pm 70.0)

K 1 publication

Characteristics of the closest known G-type exoplanet host 82 Eri

Radius

0.9 (\pm 0.03)

R_Sun 1 publication

Characteristics of the closest known G-type exoplanet host 82 Eri

Metallicity [Fe/H]

-0.38 (\pm 0.06)

1 publication

Characteristics of the closest known G-type exoplanet host 82 Eri

Detected Disc

IR Excess

1 publication

Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems

Magnetic Field

—

RA₂₀₀₀

03:19:56.0

Dec₂₀₀₀

-43:04:11.0

Alternate Names

e Eri, HD 20794, GJ 139

No remarks

No link

Simbad
Most recent references (ADS)

Planet 82 Eri e

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 4 planets

Remarks No remark

Other web pages No page

More data 2 references

Planet 82 Eri e

Planet

Basic informations 28 parameters

Atmospheric parameters : Temperatures 0 temperatures

Atmospheric parameters : Molecules 0 molecules

Remarks Some remarks

Other web pages No page

Star

Basic informations 13 parameters

Planetary system 4 planets

Remarks No remark

Other web pages No page

More data 2 references

Related publications

Revisiting the multi-planetary system of the nearby star HD 20794. Confirmation of a low-mass planet in the habitable zone of a nearby G-dwarf

The Detectability of Nightside City Lights on Exoplanets

An Integrative Analysis of the Rich Planetary System of the Nearby Star e Eridani: Ideal Targets For Exoplanet Imaging and Biosignature Searches

Evidence for at least three planet candidates orbiting HD20794

Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems

Characteristics of the closest known G-type exoplanet host 82 Eri

The HARPS search for Earth-like planets in the habitable zone. I. Very low-mass planets around HD 20794, HD 85512, and HD 192310