Temperature
5486 K
5440 to 5632
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Stellar HostProfile
Kepler-1991
Unclassified star • 855.8 pc
Records
18
literature rows
Planets
2
system count
References
12
distinct source labels
TIC: TIC 164831457
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: Fulton & Petigura 2018 • System source: TICv8
Mass
0.94 Msun
0.91 to 0.96
Radius
0.96 Rsun
0.60 to 1.05
Age
6.76 Gyr
0.40 to 6.76
Distance
855.8 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.96 R☉ • circles scaled linearly by radius
Sun
1.0 R☉ baseline
Kepler-1991
0.96 R☉
System Layout
Known planets
2 planets linked to this host
Kepler-1991 b
Transit
◌
Discovery
2023
Period
13.26 days
Radius
1.47 R⊕
Mass
—
Eq. Temp
760 K
Kepler-1991 c
Transit
◌
Discovery
2023
Period
22.79 days
Radius
2.57 R⊕
Mass
—
Eq. Temp
634 K
Kepler-1991 and Its Two Planets
Kepler-1991 is a star located 2790 light-years away. It is 6.76 billion years old, has a mass of 0.941 solar masses, a radius of 0.961 solar radii, and a temperature of 5490 K. Its reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's. Two planets are known to orbit this host.
Kepler-1991 b is an Earth-like planet discovered by transit in 2023. It completes one orbit, or year, in 13.3 days and has a radius of 1.47 Earth radii, larger than Earth's. Among the listed planets, it has the shortest year and the smallest radius.
Kepler-1991 c is a Neptune-like planet, also discovered by transit in 2023. Its year lasts 22.8 days, and its radius is 2.57 Earth radii, larger than Earth's. Among the listed planets, it has the longest year and the largest radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
18
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 |
|---|---|---|---|---|---|---|---|---|
| 5478 | 0.91 | 1.05 | — | — | — | 855.8 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5440 | — | 0.60 | — | — | — | 855.8 | Latham et al. 2005 | TICv8 |
| 5603 | 0.92 | 0.82 | 0.40 | — | — | 855.8 | Q1-Q8 KOI Table | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5478 | 0.91 | 1.05 | — | — | — | 855.8 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q16 KOI Table | TICv8 |
| 5486 | 0.94 | 0.96 | 6.76 | — | — | 855.8 | Fulton & Petigura 2018 | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q12 KOI Table | TICv8 |
| 5440 | 0.93 | 0.83 | — | — | — | 855.8 | Batalha et al. 2013 | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q12 KOI Table | TICv8 |
| 5440 | — | 0.83 | — | — | — | 855.8 | Q1-Q6 KOI Table | TICv8 |
| 5440 | — | 0.83 | — | — | — | 855.8 | Q1-Q6 KOI Table | TICv8 |
| — | — | — | — | — | — | 855.8 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q17 DR24 KOI Table | TICv8 |
| — | — | — | — | — | — | 855.8 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5603 | 0.92 | 0.82 | 0.40 | — | — | 855.8 | Q1-Q8 KOI Table | TICv8 |
| 5477 | 0.96 | 0.98 | — | -0.11 | — | 855.8 | TICv8 | TICv8 |
| 5632 | 0.95 | 0.86 | — | — | — | 855.8 | Q1-Q16 KOI Table | TICv8 |