HD 20782 Overview
HD 20781
0.83
R⦿
5342.00
K
HD 20781 b
HD 20781 c
HD 20781 d
HD 20781 e
HD 20782
1.09
R⦿
5798.00
K
HD 20782 b
- Other Data
- Bibliography 23
- Exoplanet Archive Notes 4
- HD 20781 Nearby Data 5
- HD 20782 Nearby Data 5
Discovery Data
| Host | Planet | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|
| HD 20781 | HD 20781 b | Radial Velocity | 2019 | Udry et al. 2019 | Confirmed Planet |
| HD 20781 | HD 20781 c | Radial Velocity | 2019 | Udry et al. 2019 | Confirmed Planet |
| HD 20781 | HD 20781 d | Radial Velocity | 2019 | Udry et al. 2019 | Confirmed Planet |
| HD 20781 | HD 20781 e | Radial Velocity | 2019 | Udry et al. 2019 | Confirmed Planet |
| HD 20782 | HD 20782 b | Radial Velocity | 2006 | Jones et al. 2006 | Confirmed Planet |
HD 20782
- This reference contains discussion regarding the stellar multiplicity of this system. (Desidera & Barbieri 2007)
- This reference contains discussion regarding the stellar multiplicity of this system. (Udry et al. 2019)
- This reference contains discussion regarding the stellar multiplicity of this system. (Mugrauer 2019)
- Stellar mass selected from evolutionary track mass (M_track) in Table 4 (Ghezzi et al. 2010)
- RA
- 03h20m03.35s
- Dec
- -28d47m02.82s
- Distance
-
35.9715+0.0527-0.0526pc
- Parallax
- 27.7709000±0.0403991 mas
- Ecliptic Latitude
- -45.14521 deg
- Ecliptic Longitude
- 37.01168 deg
- Galactic Latitude
- -57.2719 deg
- Galactic Longitude
- 224.6733 deg
- Total Proper Motion
- 355.1593046±0.0656321 mas/yr
- Proper Motion (RA)
- 348.8470000±0.0652107 mas/yr
- Proper Motion (Dec)
- -66.6626000±0.0762735 mas/yr
- Photometry
-
mV8.48±0.03
-
mTESS7.7242±0.0060
-
mJ7.045±0.024
-
mH6.642±0.042
-
mKs6.553±0.023
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mGaia8.237200±0.000214
-
mB9.239±0.030
-
Abundances
(Hypatia Catalog) -
[Fe/H] -0.07±0.04 dex
-
[C/H] -0.01±0.09 dex
-
[O/H] 0.00±0.16 dex
-
[Na/H] -0.12±0.10 dex
-
[Mg/H] -0.02±0.05 dex
-
[Al/H] -0.01±0.08 dex
-
[Si/H] -0.07±0.04 dex
-
[Ca/H] -0.02±0.04 dex
-
[Y/H] -0.10±0.08 dex
-
[BaII/H] -0.08±0.07 dex
| Source | TICv8 |
Udry et al. 2019 |
Gaia DR2 | Sousa et al. 2008 | Gray et al. 2006 | Nordstrom et al. 2004 | Cannon & Pickering 1918 |
|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
5258.150+109.043-155.017
|
5256±29 |
5342.0+72.5-75.0
|
5256±29 | --- | --- | --- |
|
L✶
(log10(L⦿))
|
-0.2881629+0.0075371-0.0135901
|
-0.31+0.03-0.04
|
-0.29256533+0.00092389-0.00092585
|
-0.309+0.032-0.035
|
--- | --- | --- |
|
γ
(km/s)
|
--- | --- | 40.308952101981092±0.143054695547738 | --- | --- | 39.6±0.2 | --- |
|
R✶
(R⦿)
|
0.8647790+0.0582477-0.0475814
|
--- |
0.8336087+0.0239095-0.0221746
|
--- | --- | --- | --- |
|
Metallicity
(dex)
|
-0.1150000±0.0141421 [M/H] | -0.11±0.02 [Fe/H] | --- | -0.11±0.02 [Fe/H] | --- | --- | --- |
|
M✶
(M⦿)
|
0.9000000+0.1160620-0.0984809
|
0.70 | --- | 0.760 | --- | --- | --- |
|
log g
(log10(cm/s2))
|
4.5185000+0.0874535-0.0815689
|
4.37±0.05 | --- | 4.37±0.05 | --- | --- | --- |
|
v sin i
(km/s)
|
--- | 1.1 | --- | --- | --- | 2 | --- |
|
Sp. T
|
--- | K0 V | --- | --- | G9.5 V | --- | G0 |
|
Prot
(days)
|
--- | 46.8±4.4 | --- | --- | --- | --- | --- |
|
ρ✶
(g/cm3)
|
1.9619707+0.4786078-0.4608299
|
--- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Udry et al. 2019 |
|---|---|
|
Tp
(days)
|
2455503.2027+2.0979-1.5934
|
|
ω
(deg)
|
84.040+141.700-108.410
|
|
Mp sin i
(M⨁)
|
1.93+0.39-0.36
|
|
Mp sin i
(MJup)
|
0.0061+0.0012-0.0011
|
|
e
|
0.10+0.11-0.07
|
|
P
(days)
|
5.3135±0.0010 |
|
K
(m/s)
|
0.910±0.150 |
|
a
(au)
|
0.0529+0.0024-0.0027
|
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Udry et al. 2019 |
|---|---|
|
Tp
(days)
|
2455503.5204+2.0425-2.6815
|
|
ω
(deg)
|
7.440+53.870-70.210
|
|
Mp sin i
(M⨁)
|
5.33+0.70-0.67
|
|
Mp sin i
(MJup)
|
0.0168+0.0022-0.0021
|
|
e
|
0.090+0.090-0.060
|
|
P
(days)
|
13.8905+0.0033-0.0034
|
|
K
(m/s)
|
1.81±0.16 |
|
a
(au)
|
0.1004+0.0046-0.0051
|
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Udry et al. 2019 |
|---|---|
|
Tp
(days)
|
2455511.3258+2.4394-2.4382
|
|
ω
(deg)
|
60.99+30.79-30.03
|
|
Mp sin i
(M⨁)
|
10.61+1.20-1.19
|
|
Mp sin i
(MJup)
|
0.0334+0.0038-0.0037
|
|
e
|
0.11+0.05-0.06
|
|
P
(days)
|
29.1580+0.0102-0.0100
|
|
K
(m/s)
|
2.82+0.17-0.16
|
|
a
(au)
|
0.1647+0.0076-0.0083
|
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Udry et al. 2019 |
|---|---|
|
Tp
(days)
|
2455513.3912+14.3623-16.0090
|
|
ω
(deg)
|
70.590+61.400-67.580
|
|
Mp sin i
(M⨁)
|
14.03±1.56 |
|
Mp sin i
(MJup)
|
0.0442±0.0049 |
|
e
|
0.060+0.060-0.040
|
|
P
(days)
|
85.5073+0.0983-0.0947
|
|
K
(m/s)
|
2.60±0.14 |
|
a
(au)
|
0.3374+0.0155-0.0170
|
- RA
- 03h20m03.99s
- Dec
- -28d51m15.67s
- Distance
-
35.9864+0.0414-0.0413pc
- Parallax
- 27.7593000±0.0317043 mas
- Ecliptic Latitude
- -45.2115 deg
- Ecliptic Longitude
- 36.97862 deg
- Galactic Latitude
- -57.27708 deg
- Galactic Longitude
- 224.80293 deg
- Total Proper Motion
- 355.1122675±0.0357759 mas/yr
- Proper Motion (RA)
- 349.0570000±0.0355975 mas/yr
- Proper Motion (Dec)
- -65.2988000±0.0405422 mas/yr
- Photometry
-
mV7.36±0.03
-
mTESS6.7634±0.0060
-
mJ6.229±0.019
-
mH5.956±0.038
-
mKs5.827±0.016
-
mW15.823±0.137
-
mW25.712±0.048
-
mW35.814±0.014
-
mW45.761±0.036
-
mGaia7.192830±0.000122
-
mB7.963±0.020
-
Abundances
(Hypatia Catalog) -
[Fe/H] -0.02±0.08 dex
-
[C/H] -0.02±0.07 dex
-
[O/H] -0.07±0.15 dex
-
[Na/H] -0.12±0.12 dex
-
[Mg/H] 0.01±0.08 dex
-
[Al/H] -0.05±0.09 dex
-
[Si/H] -0.06±0.04 dex
-
[Ca/H] 0.01±0.07 dex
-
[Y/H] -0.14±0.09 dex
-
[BaII/H] -0.05±0.11 dex
| Source |
TICv8 |
Gaia DR2 |
Stassun et al. 2017 |
Kane et al. 2016 |
Ghezzi et al. 2010 | Sousa et al. 2008 | Takeda et al. 2007 | Gray et al. 2006 |
Jones et al. 2006 |
Valenti & Fischer 2005 | Nordstrom et al. 2004 | Henry et al. 1996 | Michigan Catalog, Vol. 3 | Cannon & Pickering 1918 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
S Index
|
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | 0.176 | --- | --- |
|
CAII LOG RHK
|
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | -4.91 | --- | --- |
|
Teff
(K)
|
5782.1300+76.9625-127.4710
|
5795.00+55.00-55.75
|
5790±15 | 5798±44 | 5732±22 | 5774±14 | --- | --- | 5758±30 | --- | --- | --- | --- | --- |
|
Metallicity
(dex)
|
-0.0537223±0.0039502 [M/H] | --- | -0.06 [Fe/H] | 0.01±0.03 [Fe/H] | -0.06±0.02 [Fe/H] | -0.06±0.01 [Fe/H] | --- | --- | -0.05±0.03 [Fe/H] | --- | --- | --- | --- | --- |
|
v sin i
(km/s)
|
--- | --- | --- | 1.7±0.5 | --- | --- | --- | --- | --- | 2.4±0.5 | 3 | --- | --- | --- |
|
Age
(Gyr)
|
--- | --- | --- | 5.53±1.43 | 8.5±2.5 | --- | 9.680±1.760 | --- |
7.1 +1.9-4.3
|
--- | --- | --- | --- | --- |
|
M✶
(M⦿)
|
1.040000+0.134951-0.107228
|
--- | 1.07±0.07 | 1.02±0.02 | 0.950±0.100 | 0.947 |
0.969+0.024-0.022
|
--- | 1.0±0.03 | --- | --- | --- | --- | --- |
|
R✶
(R⦿)
|
1.1268100+0.0471693-0.0420166
|
1.1227074+0.0219174-0.0210116
|
1.11±0.01 | 1.09±0.04 | 1.08±0.09 | --- |
1.14+0.06-0.05
|
--- | --- | --- | --- | --- | --- | --- |
|
log g
(log10(cm/s2))
|
4.3514000+0.0515709-0.0829050
|
--- | 4.38±0.03 | 4.36±0.06 | 4.23±0.09 | 4.37±0.01 | 4.33±0.04 | --- | --- | --- | --- | --- | --- | --- |
|
L✶
(log10(L⦿))
|
0.10674489+0.00864725-0.01432983
|
0.10744158+0.00078115-0.00078256
|
--- | --- | 0.0530±0.0630 |
0.09132+0.00974-0.00997
|
--- | --- |
1.25 +0.2-0.17
|
--- | --- | --- | --- | --- |
|
γ
(km/s)
|
--- | 39.88789687630090±0.13122812915638 | --- | --- | --- | --- | --- | --- | --- | 40.7 | 39.5±0.2 | --- | --- | --- |
|
Sp. T
|
--- | --- | --- | --- | --- | --- | --- | G1.5 V | --- | --- | --- | --- | G3 V | G0 |
|
ρ✶
(g/cm3)
|
1.0248281+0.1472042-0.2208521
|
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Udry et al. 2019 |
Stassun et al. 2017 |
Kane et al. 2016 |
O'Toole et al. 2009 |
Jones et al. 2006 |
|---|---|---|---|---|---|
|
Tp
(days)
|
2455247.0150+0.0770-0.0837
|
--- | 2457038.458±0.094 | 2451175.9±8.4 | 2451687.1±2.5 |
|
ω
(deg)
|
143.58+0.56-0.66
|
--- | 142.1±2.1 | 98.6±5.7 | 147±3 |
|
Mp sin i
(M⨁)
|
472.83+33.22-33.88
|
620±188 | 454±10 | 232.01±15.89 | 572.07±73.10 |
|
Mp sin i
(MJup)
|
1.4878+0.1045-0.1066
|
1.95±0.59 | 1.43±0.03 | 0.73±0.05 | 1.80±0.23 |
|
e
|
0.950±0.001 | 0.97±0.01 | 0.956±0.004 | 0.57±0.04 | 0.92±0.03 |
|
P
(days)
|
597.0643±0.0256 | 591.90002±2.80000 | 597.065±0.043 | 577.9±2.6 | 585.86±0.03 |
|
K
(m/s)
|
118.43±1.78 | 185.3±49.7 | 116.0±4.2 | 21.7±1.2 | 115±12 |
|
a
(au)
|
1.3649+0.0466-0.0495
|
1.37±0.02 | 1.397±0.009 | 1.359±0.005 | 1.36±0.12 |
Literature Time Series
(1 File Type, 1 File)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 179 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
Literature Time Series
(2 File Types, 2 Files)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 198 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
| Radial Velocity Curve | 30 | Optical Spectra | Jones et al. 2006 |
- Known Objects
- 1 Confirmed Planets
- 1 2MASS Point Source Catalog
- Data Files
- 4 KELT Time Series
- 1 SuperWASP Time Series
- 1 Associated Literature Data
- Known Objects
- 1 Confirmed Planets
- 1 2MASS Point Source Catalog
- Data Files
- 4 KELT Time Series
- 1 SuperWASP Time Series
- 1 Associated Literature Data
-
Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release
Mugrauer 2019 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
The HARPS search for southern extra-solar planets. XLIV. Eight HARPS multi-planet systems hosting 20 super-Earth and Neptune-mass companions
Udry et al. 2019 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun et al. 2017 | Reference Overview -
Evidence for Reflected Light from the Most Eccentric Exoplanet Known
Kane et al. 2016 | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
Ghezzi et al. 2010 | Reference Overview -
Selection functions in doppler planet searches
O'Toole et al. 2009 | Reference Overview -
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
Sousa et al. 2008 | Reference Overview -
Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
Takeda et al. 2007 | Reference Overview -
Properties of planets in binary systems. The role of binary separation
Desidera & Barbieri 2007 | Reference Overview -
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
Gray et al. 2006 | Reference Overview -
High-eccentricity planets from the Anglo-Australian Planet Search
Jones et al. 2006 | Reference Overview -
Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs
Valenti & Fischer 2005 | Reference Overview -
The Geneva-Copenhagen survey of the Solar neighbourhood. Ages,metallicities and kinematix properties of ~14 000 F and G dwarfs
Nordstrom et al. 2004 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview -
The Hipparcos and Tycho Photometric System Passbands
Tycho 2 converted using Bessell 2000 | Reference Overview -
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog | Reference Overview -
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs | Reference Overview -
A Survey of Ca II H and K Chromospheric Emission in Southern Solar-Type Stars
Henry et al. 1996 | Reference Overview -
Michigan Catalog of two-dimensional spectral types for the HD stars, Vol 3
Michigan Catalog, Vol. 3 | Reference Overview -
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 | Reference Overview
- System
- Star
- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
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- Time Series
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