Temperature
4584 K
4359 to 4584
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Stellar HostProfile
Kepler-388
Unclassified star
Records
19
literature rows
Planets
2
system count
References
13
distinct source labels
TIC: TIC 164786156
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
0.73 Msun
0.59 to 0.73
Radius
0.69 Rsun
0.56 to 1.01
Age
3.98 Gyr
3.98 to 13.90
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.69 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-388
0.69 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-388 b
Transit
◌
Discovery
2014
Period
3.17 days
Radius
0.81 R⊕
Mass
—
Eq. Temp
—
Kepler-388 c
Transit
◌
Discovery
2014
Period
13.30 days
Radius
0.86 R⊕
Mass
—
Eq. Temp
—
Kepler-388 and Its Two Sub-Earth Planets
Kepler-388 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 viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. The star's reported mass estimate is 0.73 solar masses, its reported radius estimate is 0.69 solar radii, and its reported temperature is 4580 K, all smaller or cooler than the Sun's corresponding values. Its age is 3.98 billion years.
Kepler-388 b and Kepler-388 c are both Sub-Earths, a size class comparing radius with Earth's: a Sub-Earth is smaller than Earth. Kepler-388 b has a reported radius estimate of 0.81 Earth radii, smaller than Earth's, and an orbital period of 3.17 days. Kepler-388 c has a reported radius estimate of 0.86 Earth radii, also smaller than Earth's, and an orbital period of 13.3 days. Among the listed planets, Kepler-388 b has the shortest year and the smallest radius by reported estimates, while Kepler-388 c has the longest year and the largest radius by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
19
Stellar refs
12
System refs
1
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q17 DR25 KOI Table | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q17 DR24 KOI Table | TICv8 |
| 4498 | — | 0.59 | — | — | — | — | Rowe et al. 2014 | TICv8 |
| 4530 | 0.64 | 0.61 | 13.90 | — | — | — | Q1-Q8 KOI Table | TICv8 |
| 4359 | 0.59 | 0.56 | — | — | — | — | Batalha et al. 2013 | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q12 KOI Table | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q16 KOI Table | TICv8 |
| 4530 | 0.64 | 0.61 | 13.90 | — | — | — | Q1-Q8 KOI Table | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q17 DR25 KOI Table | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q17 DR24 KOI Table | TICv8 |
| 4359 | — | 0.56 | — | — | — | — | Q1-Q6 KOI Table | TICv8 |
| 4452.8 | — | 1.01 | — | -0.44 | — | — | Gaia DR2 | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q12 KOI Table | TICv8 |
| 4359 | — | 0.56 | — | — | — | — | Q1-Q6 KOI Table | TICv8 |
| 4584 | 0.73 | 0.69 | 3.98 | — | — | — | Morton et al. 2016 | TICv8 |
| 4359 | — | 0.67 | — | — | — | — | Latham et al. 2005 | TICv8 |
| — | — | — | — | — | — | — | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4500 | 0.63 | 0.63 | — | — | — | — | Q1-Q16 KOI Table | TICv8 |
| — | — | — | — | — | — | — | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |