Temperature
5532 K
5361.7 to 5896
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Stellar HostProfile
Kepler-308
Unclassified star • 1335.9 pc
Records
20
literature rows
Planets
2
system count
References
15
distinct source labels
TIC: TIC 184162776
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
0.92 Msun
0.92 to 1.02
Radius
0.89 Rsun
0.89 to 0.95
Age
4.17 Gyr
0.50 to 4.17
Distance
1335.9 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.89 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-308
0.89 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-308 b
Transit
◌
Discovery
2014
Period
9.69 days
Radius
2.12 R⊕
Mass
—
Eq. Temp
—
Kepler-308 c
Transit
◌
Discovery
2014
Period
15.38 days
Radius
2.16 R⊕
Mass
—
Eq. Temp
—
Kepler-308 and Its Two Super-Earths
Kepler-308 is a star 4360 light-years away with two known planets, both discovered by transit in 2014. The star is 4.17 billion years old, with a mass of 0.92 solar masses, a radius of 0.89 solar radii, and a temperature of 5530 K. Its mass and radius are smaller than the Sun's, and it is cooler than the Sun.
Both planets are Super-Earths, a size class that reaches 2.5 times Earth's radius. Kepler-308 b has an orbital period of 9.69 days and a radius of 2.12 Earth radii, while Kepler-308 c has an orbital period of 15.4 days and a radius of 2.16 Earth radii. Both radii are larger than Earth's. Among the listed planets, Kepler-308 b has the shortest year and the smallest radius, while Kepler-308 c has the longest year and the largest radius. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness, and repeated dips help establish orbital periods.
Provenance
Underlying measurements and references
Evidence Summary
Rows
20
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 |
|---|---|---|---|---|---|---|---|---|
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5676 | — | 0.89 | — | — | — | 1335.9 | Q1-Q6 KOI Table | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q16 KOI Table | TICv8 |
| 5876 | 1.00 | 0.89 | 0.50 | — | — | 1335.9 | Q1-Q8 KOI Table | TICv8 |
| 5676 | — | 0.91 | — | — | — | 1335.9 | Latham et al. 2005 | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q16 KOI Table | TICv8 |
| 5676 | — | 0.89 | — | — | — | 1335.9 | Batalha et al. 2013 | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q12 KOI Table | TICv8 |
| 5876 | 1.00 | 0.89 | 0.50 | — | — | 1335.9 | Q1-Q8 KOI Table | TICv8 |
| 5895 | — | 0.94 | — | — | — | 1335.9 | Rowe et al. 2014 | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q12 KOI Table | TICv8 |
| 5532 | 0.92 | 0.89 | 4.17 | — | — | 1335.9 | Morton et al. 2016 | TICv8 |
| — | — | — | — | — | — | 1335.9 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5895 | — | 0.89 | — | — | — | 1335.9 | Berger et al. 2018 | TICv8 |
| 5705 | 1.02 | 0.90 | — | -0.12 | — | 1335.9 | TICv8 | TICv8 |
| — | — | — | — | — | — | 1335.9 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5361.7 | — | 0.95 | — | -0.17 | — | 1335.9 | Gaia DR2 | TICv8 |
| 5896 | 1 | 0.91 | — | — | — | 1335.9 | Q1-Q17 DR25 KOI Table | TICv8 |