Temperature
4403 K
4236 to 4406
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Stellar HostProfile
Kepler-1999
Unclassified star • 701.3 pc
Records
7
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 48131702
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: Q1-Q17 DR24 KOI Table • System source: TICv8
Mass
0.63 Msun
0.63 to 0.68
Radius
0.63 Rsun
0.61 to 0.71
Distance
701.3 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.63 R☉ • circles scaled linearly by radius
Sun
1.0 R☉ baseline
Kepler-1999
0.63 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1999 b
Transit
◌
Discovery
2023
Period
8.74 days
Radius
3.29 R⊕
Mass
—
Eq. Temp
577 K
Kepler-1999 b: A Neptune-Like World in a Distant System
Kepler-1999 is a single star located 2290 light-years from Earth. The star has a mass of 0.632 solar masses and a radius of 0.627 solar radii, both smaller than the Sun's corresponding values. Its temperature is 4400 K, cooler than the Sun's. One planet orbits this host.
That planet is Kepler-1999 b, a Neptune-like world 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. Repeated dips help establish orbital periods. Kepler-1999 b completes one orbit every 8.74 days and has a radius of 3.29 Earth radii, larger than Earth's. This radius places it within the Neptune-like size class, which reaches up to four times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4406 | 0.63 | 0.63 | — | — | — | 701.3 | Q1-Q17 DR25 KOI Table | TICv8 |
| — | — | — | — | — | — | 701.3 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4236 | — | 0.61 | — | — | — | 701.3 | Latham et al. 2005 | TICv8 |
| 4376 | 0.68 | 0.71 | — | -0.77 | — | 701.3 | TICv8 | TICv8 |
| — | — | — | — | — | — | 701.3 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4403 | 0.63 | 0.63 | — | — | — | 701.3 | Q1-Q17 DR24 KOI Table | TICv8 |
| 4406 | 0.63 | 0.63 | — | — | — | 701.3 | Q1-Q17 DR25 KOI Table | TICv8 |