Temperature
5581.4 K
5525 to 5740
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Stellar HostProfile
Kepler-1998
Unclassified star • 341.0 pc
Records
13
literature rows
Planets
1
system count
References
12
distinct source labels
TIC: TIC 164525250
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: TICv8 • System source: TICv8
Mass
0.98 Msun
0.85 to 0.98
Radius
0.99 Rsun
0.87 to 0.99
Luminosity
-0.07 log(Lsun)
single adopted value
Distance
341.0 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.99 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-1998
0.99 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1998 b
Transit
◌
Discovery
2023
Period
3.03 days
Radius
0.60 R⊕
Mass
—
Eq. Temp
1187 K
Kepler-1998 b: A Sub-Earth Planet in a Distant System
Kepler-1998 is a star located 1110 light-years from Earth, with one known planet in orbit around it. The host star has a mass of 0.985 solar masses, a radius of 0.991 solar radii, and a temperature of 5580 K. Its reported temperature is cooler than the Sun's.
The system's only named planet is Kepler-1998 b, a Sub-Earth discovered by the transit method in 2023. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. Kepler-1998 b completes an orbit every 3.03 days and has a radius of 0.6 Earth radii. Its reported radius estimate is smaller than Earth's, and as a Sub-Earth it belongs to a size class defined by having a radius smaller than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Stellar refs
11
System refs
1
Distancestable
Parallaxstable
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 |
|---|---|---|---|---|---|---|---|---|
| 5640 | 0.96 | 0.92 | — | — | — | 341.0 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5581.4 | 0.98 | 0.99 | — | -0.07 | — | 341.0 | TICv8 | TICv8 |
| 5525 | — | 0.87 | — | — | — | 341.0 | Q1-Q6 KOI Table | TICv8 |
| 5640 | 0.96 | 0.92 | — | — | — | 341.0 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5725 | 0.87 | 0.88 | — | — | — | 341.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| — | — | — | — | — | — | 341.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5525 | 0.85 | 0.87 | — | — | — | 341.0 | Batalha et al. 2013 | TICv8 |
| 5725 | 0.87 | 0.88 | — | — | — | 341.0 | Q1-Q12 KOI Table | TICv8 |
| 5725 | 0.87 | 0.88 | — | — | — | 341.0 | Q1-Q16 KOI Table | TICv8 |
| — | — | — | — | — | — | 341.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5525 | — | 0.95 | — | — | — | 341.0 | Latham et al. 2005 | TICv8 |
| 5740 | 0.93 | 0.91 | 4.70 | — | — | 341.0 | Q1-Q8 KOI Table | TICv8 |
| 5606 | 0.97 | 0.96 | 4.27 | — | — | 341.0 | Fulton & Petigura 2018 | TICv8 |