Temperature
5732 K
5732 to 5798
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Stellar HostProfile
HD 20782
Unclassified star • 35.99 pc
Records
14
literature rows
Planets
5
system count
References
15
distinct source labels
HD: HD 20782HIP: HIP 15527TIC: TIC 144503325
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Ghezzi et al. 2010 • System source: TICv8
Mass
0.95 Msun
0.95 to 1.07
Radius
1.08 Rsun
1.08 to 1.14
Age
8.50 Gyr
5.53 to 9.68
Luminosity
0.05 log(Lsun)
0.05 to 1.25
Distance
35.99 pc
single adopted value
Planets
5
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.08 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 20782
1.08 R☉
System Layout
Known planets
1 planets linked to this host
HD 20782 b
Radial Velocity
◌
Discovery
2006
Period
597.1 days
Radius
—
Mass
472.8 M⊕
Eq. Temp
—
HD 20782 and Its Lone Known Planet
HD 20782 is a star 117 light-years away with a spectral type of G1.5 V, a Sun-like classification. Its measured age is 8.5 billion years, its mass is 0.95 solar masses, its radius is 1.08 solar radii, and its temperature is 5730 K, cooler than the Sun's. One planet is known to orbit this host.
That planet is HD 20782 b, discovered in 2006 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. Its minimum mass, a lower bound on its true mass, is 473 Earth masses and roughly 1.49 times Jupiter's mass, larger than Earth's. Its orbital period is 597 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
14
Stellar refs
14
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | G0 | 35.99 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | — | 35.99 | Nordstrom et al. 2004 | TICv8 |
| — | — | — | — | — | G1.5 V | 35.99 | Gray et al. 2006 | TICv8 |
| — | — | — | — | — | — | 35.99 | Henry et al. 1996 | TICv8 |
| 5795 | — | 1.12 | — | 0.11 | — | 35.99 | Gaia DR2 | TICv8 |
| — | 0.97 | 1.14 | 9.68 | — | — | 35.99 | Takeda et al. 2007 | TICv8 |
| — | — | — | — | — | — | 35.99 | Valenti & Fischer 2005 | TICv8 |
| 5758 | 1 | — | 7.10 | 1.25 | — | 35.99 | Jones et al. 2006 | TICv8 |
| — | — | — | — | — | G3 V | 35.99 | Michigan Catalog, Vol. 3 | TICv8 |
| 5774 | 0.95 | — | — | 0.09 | — | 35.99 | Sousa et al. 2008 | TICv8 |
| 5790 | 1.07 | 1.11 | — | — | — | 35.99 | Stassun et al. 2017 | TICv8 |
| 5782.1 | 1.04 | 1.13 | — | 0.11 | — | 35.99 | TICv8 | TICv8 |
| 5732 | 0.95 | 1.08 | 8.50 | 0.05 | — | 35.99 | Ghezzi et al. 2010 | TICv8 |
| 5798 | 1.02 | 1.09 | 5.53 | — | — | 35.99 | Kane et al. 2016 | TICv8 |