Temperature
3748 K
3675 to 3837
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Stellar HostProfile
Kepler-438
Unclassified star
Records
10
literature rows
Planets
1
system count
References
11
distinct source labels
TIC: TIC 336266673
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: Torres et al. 2015 • System source: TICv8
Mass
0.54 Msun
0.48 to 0.63
Radius
0.52 Rsun
0.46 to 0.76
Age
4.40 Gyr
4.40 to 4.79
Luminosity
-1.36 log(Lsun)
-1.36 to -1.02
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.52 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-438
0.52 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-438 b
Transit
◌
Discovery
2015
Period
35.23 days
Radius
1.12 R⊕
Mass
—
Eq. Temp
—
Kepler-438 and Its Earth-Sized Planet
Kepler-438 is a single star with one known planet, Kepler-438 b. The star is 4.4 billion years old and has a mass of 0.544 solar masses, a radius of 0.52 solar radii, and a temperature of 3750 K. Its mass and radius are both smaller than the Sun's, and its temperature is cooler than the Sun's.
Kepler-438 b was discovered in 2015 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. It is classified as Earth-like, meaning its radius stays within 1.5 times Earth's radius. It has a radius of 1.12 Earth radii and an orbital period of 35.2 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Stellar refs
10
System refs
1
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 |
|---|---|---|---|---|---|---|---|---|
| 3748 | 0.54 | 0.52 | 4.40 | -1.36 | — | — | Torres et al. 2015 | TICv8 |
| 3749 | 0.55 | 0.52 | — | — | — | — | Q1-Q17 DR25 KOI Table | TICv8 |
| 3747 | 0.63 | 0.66 | — | -1.11 | — | — | TICv8 | TICv8 |
| 3688 | 0.48 | 0.46 | — | — | — | — | Q1-Q16 KOI Table | TICv8 |
| 3837 | 0.57 | 0.54 | 4.79 | — | — | — | Morton et al. 2016 | TICv8 |
| 3688 | 0.48 | 0.46 | — | — | — | — | Q1-Q12 KOI Table | TICv8 |
| 3822 | — | 0.73 | — | — | — | — | Latham et al. 2005 | TICv8 |
| 3688 | 0.48 | 0.46 | — | — | — | — | Q1-Q17 DR24 KOI Table | TICv8 |
| 3675 | — | 0.76 | — | -1.02 | — | — | Gaia DR2 | TICv8 |
| — | — | — | — | — | — | — | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |