Temperature
6156.5 K
6120 to 6156.5
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Stellar HostProfile
Kepler-1921
Unclassified star • 929.0 pc
Records
15
literature rows
Planets
2
system count
References
8
distinct source labels
TIC: TIC 239287963
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
1.17 Msun
1.17 to 1.32
Radius
2.22 Rsun
2 to 2.22
Luminosity
0.81 log(Lsun)
single adopted value
Distance
929.0 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 2.22 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-1921
2.22 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-1921 b
Transit
◌
Discovery
2021
Period
20.03 days
Radius
2.89 R⊕
Mass
—
Eq. Temp
—
Kepler-1921 c
Transit
◌
Discovery
2023
Period
3.16 days
Radius
1.41 R⊕
Mass
—
Eq. Temp
1791 K
Kepler-1921: A Distant Star With Two Known Worlds
Kepler-1921 is a star located 3030 light-years away, hosting two planets. Its reported mass is 1.17 solar masses, its radius is 2.22 solar radii, and its temperature is 6160 K. Each of these stellar measurements is larger or hotter than the corresponding value for the Sun.
The two planets were both found 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. Kepler-1921 b, discovered in 2021, is a Neptune-like planet with a radius of 2.89 Earth radii and an orbital period of 20 days. Kepler-1921 c, discovered in 2023, is Earth-like, with a radius of 1.41 Earth radii and an orbital period of 3.16 days. Among the listed planets, Kepler-1921 b has the longest year and the largest radius, while Kepler-1921 c has the shortest year and the smallest radius by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
15
Stellar refs
7
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q16 KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR25 KOI Table | TICv8 |
| — | — | — | — | — | — | 929.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q16 KOI Table | TICv8 |
| 6149 | 1.32 | 2.06 | 3.39 | — | — | 929.0 | Fulton & Petigura 2018 | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q12 KOI Table | TICv8 |
| — | — | — | — | — | — | 929.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR24 KOI Table | TICv8 |
| 6156.5 | 1.17 | 2.22 | — | 0.81 | — | 929.0 | TICv8 | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q12 KOI Table | TICv8 |
| — | — | — | — | — | — | 929.0 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR25 KOI Table | TICv8 |
| 6120 | 1.25 | 2 | — | — | — | 929.0 | Q1-Q17 DR25 KOI Table | TICv8 |