Temperature
4679.8 K
4679.8 to 4898
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Stellar HostProfile
Kepler-1840
Unclassified star • 513.1 pc
Records
11
literature rows
Planets
1
system count
References
12
distinct source labels
TIC: TIC 171090560
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
0.75 Msun
0.70 to 0.77
Radius
0.77 Rsun
0.64 to 0.95
Luminosity
-0.59 log(Lsun)
single adopted value
Distance
513.1 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.77 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-1840
0.77 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1840 b
Transit
◌
Discovery
2021
Period
131.2 days
Radius
2.78 R⊕
Mass
—
Eq. Temp
—
Kepler-1840 and Its Neptune-like Planet
Kepler-1840 is a star 1670 light-years away. Its reported mass estimate is 0.75 solar masses, its reported radius estimate is 0.774 solar radii, and its reported temperature is 4680 K - all smaller or cooler than the Sun's corresponding values. One planet has been found orbiting this host.
That planet, Kepler-1840 b, is Neptune-like, a size class reaching up to four times Earth's radius. Its reported radius estimate is 2.78 Earth radii, larger than Earth's. It was discovered by transit in 2021, when the planet passed in front of its star from our viewpoint and caused a small dip in observed brightness; repeated dips helped establish its orbital period of 131 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
11
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 |
|---|---|---|---|---|---|---|---|---|
| 4727 | — | 0.72 | — | — | — | 513.1 | Q1-Q6 KOI Table | TICv8 |
| — | — | — | — | — | — | 513.1 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 4679.8 | 0.75 | 0.77 | — | -0.59 | — | 513.1 | TICv8 | TICv8 |
| 4696 | 0.70 | 0.64 | — | — | — | 513.1 | Q1-Q16 KOI Table | TICv8 |
| 4838 | 0.76 | 0.74 | 6.03 | — | — | 513.1 | Fulton & Petigura 2018 | TICv8 |
| 4696 | 0.70 | 0.64 | — | — | — | 513.1 | Q1-Q12 KOI Table | TICv8 |
| 4898 | 0.77 | 0.80 | — | — | — | 513.1 | Q1-Q17 DR25 KOI Table | TICv8 |
| 4696 | 0.70 | 0.64 | — | — | — | 513.1 | Q1-Q17 DR24 KOI Table | TICv8 |
| 4835 | 0.70 | 0.68 | 14 | — | — | 513.1 | Q1-Q8 KOI Table | TICv8 |
| 4727 | — | 0.95 | — | — | — | 513.1 | Latham et al. 2005 | TICv8 |
| 4727 | 0.74 | 0.72 | — | — | — | 513.1 | Batalha et al. 2013 | TICv8 |