Temperature
5231 K
5114 to 5307
←Back to Stellar Hosts
Stellar HostProfile
Kepler-397
Unclassified star
Records
15
literature rows
Planets
2
system count
References
10
distinct source labels
TIC: TIC 271963778
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
0.79 Msun
0.74 to 0.84
Radius
0.76 Rsun
0.56 to 0.77
Age
5.25 Gyr
0.60 to 5.25
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.76 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-397
0.76 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-397 b
Transit
◌
Discovery
2014
Period
22.25 days
Radius
2.46 R⊕
Mass
—
Eq. Temp
—
Kepler-397 c
Transit
◌
Discovery
2014
Period
135.5 days
Radius
6.18 R⊕
Mass
—
Eq. Temp
—
Kepler-397 and Its Two Planets
Kepler-397 is a star with two known planets, both discovered by transit in 2014. A transit occurs when a planet passes in front of its star from our viewing angle, dimming the star's light. The host star's reported mass estimate is 0.79 solar masses and its radius estimate is 0.76 solar radii, both smaller than the Sun's. Its temperature is 5230 K, cooler than the Sun's, and its age is 5.25 billion years.
Kepler-397 b is a Super-Earth with a radius of 2.46 Earth radii and an orbital period of 22.3 days. Among these planets, it has the shortest year and the smallest radius. Kepler-397 c is Jupiter-like, with a radius of 6.18 Earth radii and an orbital period of 135 days. Among the planets, it has the longest year and the largest radius, and its radius is larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
15
Stellar refs
9
System refs
1
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5307 | 0.78 | 0.76 | — | — | — | — | Q1-Q17 DR25 KOI Table | TICv8 |
| 5299 | 0.84 | 0.74 | 0.60 | — | — | — | Q1-Q8 KOI Table | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q16 KOI Table | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q16 KOI Table | TICv8 |
| 5307 | — | 0.77 | — | — | — | — | Rowe et al. 2014 | TICv8 |
| 5299 | 0.84 | 0.74 | 0.60 | — | — | — | Q1-Q8 KOI Table | TICv8 |
| 5144 | — | 0.56 | — | — | — | — | Latham et al. 2005 | TICv8 |
| 5307 | 0.78 | 0.76 | — | — | — | — | Q1-Q17 DR25 KOI Table | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q12 KOI Table | TICv8 |
| 5231 | 0.79 | 0.76 | 5.25 | — | — | — | Morton et al. 2016 | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q17 DR24 KOI Table | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q17 DR24 KOI Table | TICv8 |
| — | — | — | — | — | — | — | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| — | — | — | — | — | — | — | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5114 | 0.74 | 0.68 | — | — | — | — | Q1-Q12 KOI Table | TICv8 |