Temperature
4770 K
4724 to 4795.4
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Stellar HostProfile
ome Ser
G8 III • 76.76 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HIP: HIP 77578HD: HD 141680TIC: TIC 272677041
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. 2013 • System source: TICv8
Mass
2.17 Msun
1.01 to 2.17
Radius
12.30 Rsun
10.69 to 12.30
Luminosity
1.85 log(Lsun)
1.73 to 1.85
Distance
76.76 pc
single adopted value
Spectral Type
G8 III
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 12.30 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
ome Ser
12.30 R☉
System Layout
Known planets
1 planets linked to this host
ome Ser b
Radial Velocity
◌
Discovery
2013
Period
278.6 days
Radius
—
Mass
233.9 M⊕
Eq. Temp
—
Omega Serpentis: A Star and Its Planet
Omega Serpentis is a star 250 light-years away. It has a spectral type of G8 III. Its mass is 2.17 solar masses, its radius is 12.3 solar radii, and its temperature is 4770 K. One planet orbits this star.
That planet is ome Ser b, discovered in 2013 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. Its minimum mass is 234 Earth masses, a lower bound on its true mass, and its orbital period is 279 days. The star's reported mass estimate is larger than the Sun's, and its radius estimate is also larger than the Sun's. The star's reported temperature is cooler than the Sun's. ome Ser b's minimum mass is larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4775 | — | 11.06 | — | 1.76 | — | 76.76 | Gaia DR2 | TICv8 |
| — | — | — | — | — | K0 IV | 76.76 | Michigan Catalog, Vol. 5 | TICv8 |
| — | — | — | — | — | K0 | 76.76 | Cannon & Pickering 1918 | TICv8 |
| 4724 | 1.01 | 10.99 | — | 1.73 | G8 III | 76.76 | Teng et al. 2023 | TICv8 |
| 4770 | 2.17 | 12.30 | — | 1.85 | G8 III | 76.76 | Sato et al. 2013 | TICv8 |
| 4795.4 | — | 10.69 | — | — | — | 76.76 | TICv8 | TICv8 |