Temperature
5008 K
4936.5 to 5067
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Stellar HostProfile
HD 11977
Unclassified star • 67.93 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
TIC: TIC 232074535HIP: HIP 8928HD: HD 11977
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: Jofré et al. 2015 • System source: TICv8
Mass
2.13 Msun
1.80 to 2.31
Radius
9.94 Rsun
9.94 to 11.35
Age
1 Gyr
1 to 1.20
Luminosity
1.84 log(Lsun)
1.84 to 1.84
Distance
67.93 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 9.94 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 11977
9.94 R☉
System Layout
Known planets
1 planets linked to this host
HD 11977 b
Radial Velocity
◌
Discovery
2005
Period
711 days
Radius
—
Mass
2080 M⊕
Eq. Temp
—
HD 11977 and Its Single Known Planet
HD 11977 is a K0 star 222 light-years away with one known planet in its system. The star is estimated to be 1 billion years old, with measurements of 2.13 solar masses, 9.94 solar radii, and a temperature of 5010 K. Its reported mass and radius estimates are larger than the Sun's, while its reported temperature is cooler.
The planet HD 11977 b was discovered in 2005 using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. It has a minimum mass of 2080 Earth masses, larger than Earth's, and roughly 6.54 times Jupiter's mass. This minimum mass is a lower bound on the planet's true mass. HD 11977 b completes one orbit in 711 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
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 |
|---|---|---|---|---|---|---|---|---|
| 4970 | 1.91 | 10.09 | 1.20 | — | — | 67.93 | Setiawan et al. 2005 | TICv8 |
| 5004.9 | — | 10.60 | — | — | — | 67.93 | TICv8 | TICv8 |
| 4936.5 | — | 11.35 | — | 1.84 | — | 67.93 | Gaia DR2 | TICv8 |
| — | 1.80 | — | — | — | — | 67.93 | Kunitomo et al. 2011 | TICv8 |
| 5008 | 2.13 | 9.94 | 1 | 1.84 | — | 67.93 | Jofré et al. 2015 | TICv8 |
| 5067 | 2.31 | — | — | — | — | 67.93 | Mortier et al. 2013 | TICv8 |
| — | 2.31 | — | — | — | — | 67.93 | Soto et al. 2015 | TICv8 |
| — | — | — | — | — | G8 III/IV | 67.93 | Michigan Catalog, Vol. 1 | TICv8 |
| — | — | — | — | — | K0 | 67.93 | Cannon & Pickering 1918 | TICv8 |