Temperature
4951 K
4767 to 4954
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Stellar HostProfile
Kepler-258
Unclassified star • 576.0 pc
Records
21
literature rows
Planets
2
system count
References
15
distinct source labels
TIC: TIC 270854411
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: Morton et al. 2016 • System source: TICv8
Mass
0.82 Msun
0.70 to 0.83
Radius
0.77 Rsun
0.66 to 1.21
Age
3.63 Gyr
3.63 to 13.70
Distance
576.0 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.77 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-258
0.77 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-258 b
Transit
◌
Discovery
2014
Period
13.20 days
Radius
4.06 R⊕
Mass
—
Eq. Temp
—
Kepler-258 c
Transit
◌
Discovery
2014
Period
33.65 days
Radius
3.61 R⊕
Mass
—
Eq. Temp
—
Kepler-258: A Cool Dwarf and Its Two Giant Planets
Kepler-258 is a star located 1880 light-years away, and it hosts two known planets. The star is 3.63 billion years old, with a mass of 0.82 solar masses, a radius of 0.77 solar radii, and a temperature of 4950 K, making it smaller, less massive, and cooler than the Sun.
The two planets, Kepler-258 b and Kepler-258 c, were both discovered in 2014 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Kepler-258 b is classified as Jupiter-like, with a radius of 4.06 Earth radii and an orbital period of 13.2 days. Kepler-258 c is classified as Neptune-like, with a radius of 3.61 Earth radii and an orbital period of 33.7 days. Among the listed planets, Kepler-258 b has the shortest year and the largest radius by reported estimates, while Kepler-258 c has the longest year and the smallest radius by reported estimates. Both planets' reported radius estimates are larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
21
Stellar refs
14
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4767 | — | 1.21 | — | — | — | 576.0 | Latham et al. 2005 | TICv8 |
| 4943 | — | 0.66 | — | -0.62 | — | 576.0 | Gaia DR2 | TICv8 |
| 4767 | — | 0.83 | — | — | — | 576.0 | Q1-Q6 KOI Table | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| 4837.6 | 0.79 | 0.73 | — | -0.58 | — | 576.0 | TICv8 | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q12 KOI Table | TICv8 |
| 4767 | — | 0.83 | — | — | — | 576.0 | Q1-Q6 KOI Table | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q12 KOI Table | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| 4767 | 0.80 | 0.83 | — | — | — | 576.0 | Batalha et al. 2013 | TICv8 |
| 4944 | — | 0.74 | — | — | — | 576.0 | Berger et al. 2018 | TICv8 |
| 4942 | — | 0.92 | — | — | — | 576.0 | Rowe et al. 2014 | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q16 KOI Table | TICv8 |
| 4951 | 0.82 | 0.77 | 3.63 | — | — | 576.0 | Morton et al. 2016 | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q16 KOI Table | TICv8 |
| — | — | — | — | — | — | 576.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q17 DR25 KOI Table | TICv8 |
| — | — | — | — | — | — | 576.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4821 | 0.70 | 0.68 | 13.70 | — | — | 576.0 | Q1-Q8 KOI Table | TICv8 |
| 4821 | 0.70 | 0.68 | 13.70 | — | — | 576.0 | Q1-Q8 KOI Table | TICv8 |
| 4954 | 0.83 | 0.89 | — | — | — | 576.0 | Q1-Q17 DR25 KOI Table | TICv8 |