Temperature
5752 K
5752 to 5771.8
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Stellar HostProfile
HD 155918
G2V • 27.56 pc
Records
8
literature rows
Planets
2
system count
References
9
distinct source labels
HD: HD 155918TIC: TIC 311649327HIP: HIP 84988
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: Turnbull 2015 • System source: TICv8
Mass
1.63 Msun
1.03 to 1.63
Radius
1.07 Rsun
1.02 to 1.07
Age
12.30 Gyr
single adopted value
Luminosity
0.05 log(Lsun)
0.02 to 0.05
Distance
27.56 pc
single adopted value
Spectral Type
G2V
Multiple classifications reported
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.07 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 155918
1.07 R☉
System Layout
Known planets
2 planets linked to this host
HD 155918 b
Radial Velocity
◌
Discovery
2022
Period
1.88 days
Radius
—
Mass
7.63 M⊕
Eq. Temp
—
HD 155918 c
Radial Velocity
◌
Discovery
2022
Period
1.72e4 days
Radius
—
Mass
1878.0 M⊕
Eq. Temp
—
HD 155918 and Its Two Known Planets
HD 155918 is a G2V star 89.9 light-years away, with a reported age of 12.3 billion years, a mass of 1.63 solar masses, a radius of 1.07 solar radii, and a temperature of 5750 K. Two planets have been reported around it.
HD 155918 b was discovered in 2022 by the radial velocity method. Its minimum mass is 7.63 Earth masses, and its orbital period is 1.88 days - the shortest year among the listed planets.
HD 155918 c was also discovered in 2022 by radial velocity. Its mass is 1880 Earth masses, and it takes 17200 days to complete one orbit, the longest among the listed planets. The star's mass and radius estimates are larger than the Sun's, and its temperature is cooler than the Sun's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | G2 V | 27.56 | Michigan Catalog, Vol. 1 | TICv8 |
| 5771.8 | 1.03 | 1.02 | — | 0.02 | — | 27.56 | TICv8 | TICv8 |
| — | — | — | — | — | — | 27.56 | Valenti & Fischer 2005 | TICv8 |
| — | — | — | — | — | — | 27.56 | Nordstrom et al. 2004 | TICv8 |
| 5752 | 1.63 | 1.07 | 12.30 | 0.05 | G2V | 27.56 | Turnbull 2015 | TICv8 |
| — | 1.03 | — | — | — | — | 27.56 | Feng et al. 2022 | TICv8 |
| — | — | — | — | — | G0 | 27.56 | Cannon & Pickering 1918 | TICv8 |
| — | — | — | — | — | G2 V Fe-1.0 CH-0.6 | 27.56 | Gray et al. 2006 | TICv8 |