Temperature
5524.0 K
5475 to 5815
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Stellar HostProfile
Kepler-1821
Unclassified star • 799.7 pc
Records
10
literature rows
Planets
1
system count
References
11
distinct source labels
TIC: TIC 27187386
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
0.97 Msun
0.93 to 0.98
Radius
0.95 Rsun
0.59 to 0.95
Luminosity
-0.12 log(Lsun)
single adopted value
Distance
799.7 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.95 R☉ • circles scaled linearly by radius
Sun
1.0 R☉ baseline
Kepler-1821
0.95 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1821 b
Transit
◌
Discovery
2021
Period
16.46 days
Radius
2.59 R⊕
Mass
—
Eq. Temp
—
Kepler-1821 and Its Neptune-like Planet
Kepler-1821 is a single-star system located 2610 light-years away. Its host star has a reported mass estimate of 0.97 solar masses, a reported radius estimate of 0.947 solar radii, and a reported temperature of 5520 K. Each of these reported values is smaller or cooler than the Sun's corresponding value. The system's only listed planet is Kepler-1821 b.
Kepler-1821 b was discovered in 2021 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. Such a planet is classified as Neptune-like, a size class that extends to 4 times Earth's radius. Kepler-1821 b has a radius of 2.59 Earth radii, larger than Earth's, and an orbital period of 16.5 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Stellar refs
10
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 |
|---|---|---|---|---|---|---|---|---|
| 5524.0 | 0.97 | 0.95 | — | -0.12 | — | 799.7 | TICv8 | TICv8 |
| 5806 | 0.98 | 0.87 | 0.40 | — | — | 799.7 | Q1-Q8 KOI Table | TICv8 |
| 5815 | 0.97 | 0.88 | — | — | — | 799.7 | Q1-Q16 KOI Table | TICv8 |
| 5607 | — | 0.83 | — | — | — | 799.7 | Q1-Q6 KOI Table | TICv8 |
| — | — | — | — | — | — | 799.7 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5607 | 0.93 | 0.83 | — | — | — | 799.7 | Batalha et al. 2013 | TICv8 |
| 5815 | 0.97 | 0.88 | — | — | — | 799.7 | Q1-Q12 KOI Table | TICv8 |
| 5815 | 0.97 | 0.88 | — | — | — | 799.7 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5475 | 0.95 | 0.88 | — | — | — | 799.7 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5607 | — | 0.59 | — | — | — | 799.7 | Latham et al. 2005 | TICv8 |