Temperature
5100 K
4788 to 5100
←Back to Stellar Hosts
Stellar HostProfile
Kepler-1661
K • 410.6 pc
Records
7
literature rows
Planets
1
system count
References
8
distinct source labels
TIC: TIC 164886585
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: Socia et al. 2020 • System source: TICv8
Mass
0.84 Msun
0.73 to 0.85
Radius
0.76 Rsun
0.73 to 0.91
Age
2 Gyr
single adopted value
Distance
410.6 pc
single adopted value
Spectral Type
K
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.76 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-1661
0.76 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1661 b
Transit
◌
Discovery
2020
Period
175.1 days
Radius
3.87 R⊕
Mass
17 M⊕
Eq. Temp
243 K
Kepler-1661 b: A Circumbinary Neptune in a Two-Star System
Kepler-1661 is a binary star system 1340 light-years from Earth. The planet-hosting star is a K-type star with a spectral class cooler than the Sun's G-type. It has an age of 2 billion years, a mass of 0.841 solar masses, a radius of 0.762 solar radii, and a temperature of 5100 K. Its mass and radius are smaller than the Sun's, and its temperature is cooler. One planet is known to orbit this host.
Kepler-1661 b is a Neptune-like planet, meaning its radius falls within the size class reaching 4 times Earth's radius. It was discovered in 2020 by the transit method, in which a planet passing in front of its star causes a small dip in observed brightness. The planet is circumbinary, orbiting both stars of the binary system rather than one star alone. Its radius is 3.87 Earth radii, larger than Earth's, and its mass is 17 Earth masses, also larger than Earth's. Its mean density is 1.62 g/cm³, 0.293 times Earth's. Kepler-1661 b completes an orbit in 175 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4936 | 0.73 | 0.76 | — | — | — | 410.6 | Q1-Q17 DR24 KOI Table | TICv8 |
| 4879.8 | — | 0.78 | — | -0.51 | — | 410.6 | Gaia DR2 | TICv8 |
| 4936 | 0.73 | 0.76 | — | — | — | 410.6 | Q1-Q17 DR25 KOI Table | TICv8 |
| — | — | — | — | — | — | 410.6 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5100 | 0.84 | 0.76 | 2 | — | K | 410.6 | Socia et al. 2020 | TICv8 |
| 5070.9 | 0.85 | 0.73 | — | -0.50 | — | 410.6 | TICv8 | TICv8 |
| 4788 | — | 0.91 | — | — | — | 410.6 | Latham et al. 2005 | TICv8 |