Temperature
4979 K
4979 to 5083.8
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Stellar HostProfile
18 Del
G6 III • 76.22 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
HD: HD 199665TIC: TIC 354489950HIP: HIP 103527
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: Sato et al. 2008 • System source: TICv8
Mass
2.30 Msun
2 to 2.33
Radius
8.50 Rsun
7.82 to 8.80
Luminosity
1.60 log(Lsun)
1.58 to 1.63
Distance
76.22 pc
single adopted value
Spectral Type
G6 III
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 8.50 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
18 Del
8.50 R☉
System Layout
Known planets
1 planets linked to this host
18 Del b
Radial Velocity
◌
Discovery
2008
Period
982.9 days
Radius
—
Mass
2926.2 M⊕
Eq. Temp
—
18 Del and Its Planet
18 Del is a G6 III star 249 light-years away with one known planet. The star's reported mass estimate is 2.3 solar masses and its radius is 8.5 solar radii, both larger than the Sun's, while its temperature of 4980 K is cooler than the Sun's.
The planet, 18 Del b, was discovered by radial velocity in 2008. The radial velocity method measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. Its minimum mass is 2930 Earth masses, larger than Earth's and roughly 9.21 times Jupiter's mass. It orbits in 983 days.
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 |
|---|---|---|---|---|---|---|---|---|
| 5083.8 | — | 7.91 | — | 1.58 | — | 76.22 | Gaia DR2 | TICv8 |
| 4979 | 2.30 | 8.50 | — | 1.60 | G6 III | 76.22 | Sato et al. 2008 | TICv8 |
| 4980 | 2.10 | 8.80 | — | 1.63 | G6 III | 76.22 | Teng et al. 2023 | TICv8 |
| 5076 | 2.33 | — | — | — | — | 76.22 | Mortier et al. 2013 | TICv8 |
| — | — | — | — | — | K0 | 76.22 | Cannon & Pickering 1918 | TICv8 |
| 5054 | 2 | 8 | 1.10 | — | G6 III | 76.22 | Baines et al. 2009 | TICv8 |
| — | 2.10 | — | — | — | — | 76.22 | Kunitomo et al. 2011 | TICv8 |
| 5074.9 | — | 7.82 | — | — | — | 76.22 | TICv8 | TICv8 |