Temperature
5194 K
4978 to 5275
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Stellar HostProfile
Kepler-1221
Unclassified star • 913.6 pc
Records
11
literature rows
Planets
1
system count
References
12
distinct source labels
TIC: TIC 279912260
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: Morton et al. 2016 • System source: TICv8
Mass
0.87 Msun
0.66 to 0.87
Radius
0.82 Rsun
0.63 to 0.82
Age
4.57 Gyr
3.80 to 4.57
Distance
913.6 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.82 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
Kepler-1221
0.82 R☉
System Layout
Known planets
1 planets linked to this host
Kepler-1221 b
Transit
◌
Discovery
2016
Period
12.00 days
Radius
1.88 R⊕
Mass
—
Eq. Temp
—
Kepler-1221 and Its Super-Earth
Kepler-1221 is a star 2980 light-years away with one known planet. The host star is 4.57 billion years old and has a reported mass of 0.87 solar masses, a radius of 0.82 solar radii, and a temperature of 5190 K. Each of these estimates is smaller or cooler than the corresponding value for the Sun.
The planet Kepler-1221 b was discovered in 2016 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. Repeated dips help establish orbital periods. Kepler-1221 b completes one orbit in 12 days, and its radius of 1.88 Earth radii is larger than Earth's. That radius places it in the Super-Earth size class, which extends to 2.5 times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
11
Stellar refs
11
System refs
1
Distancestable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5195 | 0.69 | 0.69 | — | — | — | 913.6 | Q1-Q16 KOI Table | TICv8 |
| 4978 | — | — | — | — | — | 913.6 | Gaia DR2 | TICv8 |
| — | — | — | — | — | — | 913.6 | Q1-Q17 DR25 Supplemental KOI Table | TICv8 |
| 5275 | 0.82 | 0.76 | 3.80 | — | — | 913.6 | Q1-Q8 KOI Table | TICv8 |
| 5195 | 0.69 | 0.69 | — | — | — | 913.6 | Q1-Q17 DR25 KOI Table | TICv8 |
| 5053 | — | 0.80 | — | — | — | 913.6 | Latham et al. 2005 | TICv8 |
| 5053 | 0.66 | 0.63 | — | — | — | 913.6 | Batalha et al. 2013 | TICv8 |
| 5194 | 0.87 | 0.82 | 4.57 | — | — | 913.6 | Morton et al. 2016 | TICv8 |
| 5195 | 0.69 | 0.69 | — | — | — | 913.6 | Q1-Q17 DR24 KOI Table | TICv8 |
| 5053 | — | 0.63 | — | — | — | 913.6 | Q1-Q6 KOI Table | TICv8 |
| 5195 | 0.69 | 0.69 | — | — | — | 913.6 | Q1-Q12 KOI Table | TICv8 |