Temperature
5934 K
5863 to 5990
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Stellar HostProfile
HD 2039
Unclassified star • 85.69 pc
Records
14
literature rows
Planets
1
system count
References
15
distinct source labels
TIC: TIC 281461362HD: HD 2039HIP: HIP 1931
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
1.20 Msun
0.98 to 1.23
Radius
1.32 Rsun
1.14 to 1.32
Age
3.50 Gyr
3.50 to 6
Luminosity
0.29 log(Lsun)
0.19 to 0.29
Distance
85.69 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.32 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 2039
1.32 R☉
System Layout
Known planets
1 planets linked to this host
HD 2039 b
Radial Velocity
◌
Discovery
2002
Period
1120 days
Radius
—
Mass
1999.2 M⊕
Eq. Temp
—
HD 2039 and Its Planet
HD 2039 is a G5 star 279 light-years away, orbited by one known planet. The host star is 3.5 billion years old, with a mass of 1.2 solar masses, a radius of 1.32 solar radii, and a temperature of 5930 K. Its mass and radius estimates are larger than the Sun's, and its temperature is hotter.
The single planet, HD 2039 b, was discovered in 2002 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. It has a minimum mass of 2000 Earth masses, roughly 6.29 times Jupiter's mass and larger than Earth's. Its orbital period is 1120 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 |
|---|---|---|---|---|---|---|---|---|
| 5945.1 | 1.09 | 1.17 | — | 0.19 | — | 85.69 | TICv8 | TICv8 |
| 5990 | 1.20 | — | — | — | — | 85.69 | Santos et al. 2003 | TICv8 |
| — | — | — | — | — | G2/3 IV/V | 85.69 | Michigan Catalog, Vol. 1 | TICv8 |
| 5941 | 1.17 | — | — | — | — | 85.69 | Valenti & Fischer 2005 | TICv8 |
| — | — | — | — | — | — | 85.69 | Butler et al. 2006 | TICv8 |
| — | 1.12 | 1.14 | 3.64 | — | — | 85.69 | Takeda et al. 2007 | TICv8 |
| 5934 | 1.20 | 1.32 | 3.50 | 0.29 | — | 85.69 | Ghezzi et al. 2010 | TICv8 |
| 5976 | 1.18 | — | — | — | — | 85.69 | Santos et al. 2004 | TICv8 |
| 5990 | — | — | — | — | — | 85.69 | Suárez-Andrés et al. 2016 | TICv8 |
| — | — | — | — | — | G5 | 85.69 | Cannon & Pickering 1918 | TICv8 |
| — | 0.98 | — | 6 | — | G2/G3 IV/V | 85.69 | Tinney et al. 2003 | TICv8 |
| — | — | — | — | — | — | 85.69 | Nordstrom et al. 2004 | TICv8 |
| 5945 | 1.23 | 1.19 | — | — | — | 85.69 | Stassun et al. 2017 | TICv8 |
| 5863 | — | 1.21 | — | 0.19 | — | 85.69 | Gaia DR2 | TICv8 |