Stellar HostProfile

Kepler-1221

Unclassified star • 913.6 pc

Records

literature rows

Planets

system count

References

distinct source labels

TIC: TIC 279912260

Approximate color

from effective temperature

Stellar source: Morton et al. 2016 • System source: TICv8

Temperature

5194 K

4978 to 5275

10 values • 5 distinct

Mass

0.87 Msun

0.66 to 0.87

7 values • 4 distinct

Radius

0.82 Rsun

0.63 to 0.82

9 values • 5 distinct

Age

4.57 Gyr

3.80 to 4.57

2 values • 2 distinct

Distance

913.6 pc

single adopted value

11 values • 1 distinct

Planets

Stable across source rows

Sun

1.0 R☉ baseline

Kepler-1221

0.82 R☉

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.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

11 values • 1 distinct

Temperaturedisputed

10 values • 5 distinct

Massdisputed

7 values • 4 distinct

Radiusdisputed

9 values • 5 distinct

Agedisputed

2 values • 2 distinct

Surface Gravitydisputed

9 values • 4 distinct

Metallicitydisputed

6 values • 3 distinct

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

Kepler-1221

Adopted host values from one source row

Radius against the Sun

Known planets

Kepler-1221 b

Kepler-1221 and Its Super-Earth

Underlying measurements and references