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
