Planet HD 20794 d

Name HD 20794 d
Planet Status Confirmed
Discovered in 2011
Mass
Mass*sin(i) 0.01108 ( -0.003 +0.0019 ) MJ +
Semi-Major Axis 0.364 (± 0.004) AU +
Orbital Period 88.9 ( -0.41 +0.37 ) day +
Eccentricity 0.25 ( -0.21 +0.16 ) +
ω 252.0 ( -44.0 +48.0 ) deg
Tperi
Radius
Inclination
Update 2022-05-13
Detection Method Radial Velocity
Mass Detection Method Radial Velocity
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K 0.57 (± 0.07) m/s
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names 82 Eri d, e Eri d

Star

HD 20794
Name HD 20794
Distance 6.06 pc
Spectral type G8V
Apparent magnitude V 4.26
Mass 0.813 ( -0.012 +0.018 ) MSun
Age 14.0 ( -5.0 +6.0 ) Gyr
Effective temperature 5490.0 (± 70.0) K
Radius 0.9 (± 0.03) RSun
Metallicity [Fe/H] -0.38 (± 0.06)
Detected Disc IR Excess
Magnetic Field
RA2000 03:19:56.0
Dec2000 -43:04:11
Alternate Names
Planetary system
3 planets

Observability Predictor

Remarks

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.

Related publications

Searching for the nature of stars with debris disks and planets
2023 de la REZA R., CHAVERO C., ROCA-FABREGA S., LLORENTE de ANDRES F., CRUZ P. & CIFUENTES C.
Astron. & Astrophys., submitted
arxiv  

An Integrative Analysis of the Rich Planetary System of the Nearby Star e Eridani: Ideal Targets For Exoplanet Imaging and Biosignature Searches
2022 BASANT R., DIETRICH J. & APAI D.
Astron. J., 164, 12
paper   arxiv  

New wavelength calibration of the HARPS spectrograph
2019 COFFINET A., LOVIS Ch., DUMUSQUE X. & PEPE F.
Astron. & Astrophys., 629, A27
paper  arxiv  

Evidence for at least three planet candidates orbiting HD20794
2017 FENG F., TUOMI M. & JONES H.
Astron. & Astrophys., 605, A103
paper  arxiv  ADS  

Incidence of debris discs around FGK stars in the solar neighbourhood
2016 MONTESINOS B., EIROA C., KRIKOV A., MARSHALL J., PILBRATT G. et al.
Astron. & Astrophys., submitted
arxiv  

Kuiper belt structure around nearby super-Earth host stars
2015 KENNEDY G., MATRA L., MARMIER M., GREAVES J., WYATT M. et al.
MNRAS, 449, 3121
paper  arxiv  

Compact planetary systems perturbed by an inclined companion: II. Stellar spin-orbit evolution
2014 BOUE G. & FABRYCKY D.
ApJ, 789, 111
paper  arxiv  

A Uniformly Derived Catalogue of Exoplanets from Radial Velocities
2012 HOLLIS M., BALAN S., LEVER G. & LAHAV O.
MNRAS, 423, Issue 3, 2800-2814
paper  arxiv

Characteristics of the closest known G-type exoplanet host 82 Eri
2012 BERNKOPF J., CHINI R., BUDA L.-S., DEMBKY T., DRASS H. & 2 additional authors
MNRAS, in press
paper  

Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems
2012 WYATT M., KENNEDY G., SIBTHORPE B., MORO-MARTIN A., LESTRADE J.-F. & 12 additional authors
MNRAS
arxiv

The Exoplanet Handbook
2011 Michael Perryman
Content
Content and Chapter 5

The HARPS search for Earth-like planets in the habitable zone: I -- Very low-mass planets around HD20794, HD85512 and HD192310
2011 PEPE F., LOVIS Ch., SEGRANSAN D., BENZ W., BOUCHY F., DUMUSQUE X., MAYOR M., QUELOZ D., SANTOS N. & UDRY S.
Astron. & Astrophys., 534, A58
paper   arxiv