Stellar HostProfile

HD 156668

Unclassified star • 24.33 pc

Records

literature rows

Planets

system count

References

distinct source labels

TIC: TIC 257715493HD: HD 156668HIP: HIP 84607

Approximate color

from effective temperature

Stellar source: Howard et al. 2011 • System source: TICv8

Temperature

4850 K

4813 to 4903.7

5 values • 5 distinct

Mass

0.77 Msun

0.74 to 0.79

4 values • 4 distinct

Radius

0.72 Rsun

0.72 to 0.80

5 values • 5 distinct

Age

8.60 Gyr

single adopted value

1 values • 1 distinct

Luminosity

0.23 log(Lsun)

-0.54 to 0.23

4 values • 4 distinct

Distance

24.33 pc

single adopted value

8 values • 1 distinct

Planets

Stable across source rows

Sun

1.0 R☉ baseline

HD 156668

0.72 R☉

Discovery

2010

Period

4.65 days

Radius

—

Mass

4.15 M⊕

Eq. Temp

—

Discovery

2021

Period

811.3 days

Radius

—

Mass

31.50 M⊕

Eq. Temp

—

HD 156668 and Its Two Known Planets

HD 156668 is a K2 star located 79.4 light-years away. Its reported mass is 0.772 solar masses, its radius is 0.72 solar radii, and its temperature is 4850 K, making it cooler than the Sun. The star is estimated to be 8.6 billion years old. Two planets are known to orbit it.

HD 156668 b was discovered in 2010 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. It has a minimum mass of 4.15 Earth masses and an orbital period of 4.65 days, the shortest among the listed planets.

HD 156668 c was discovered in 2021, also by radial velocity. Its minimum mass is 31.5 Earth masses, and its orbital period is 811 days, the longest among the listed planets. Both planets' minimum masses are larger than Earth's, and both minimum masses are lower bounds on their true masses rather than exact values.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

8 values • 1 distinct

Parallaxstable

8 values • 1 distinct

Temperaturedisputed

5 values • 5 distinct

Massdisputed

4 values • 4 distinct

Radiusdisputed

5 values • 5 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

4 values • 4 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitydisputed

3 values • 3 distinct

Spectral Typedisputed

3 values • 2 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
—	—	—	—	—	K3 V	24.33	Gray et al. 2003	TICv8
4813	0.74	0.80	—	-0.51	K2	24.33	Turnbull 2015	TICv8
—	—	—	—	—	—	24.33	Wright et al. 2004	TICv8
4831.5	—	0.77	—	-0.54	—	24.33	Gaia DR2	TICv8
4903.7	0.79	0.77	—	—	—	24.33	Rosenthal et al. 2021	TICv8
—	—	—	—	—	K2	24.33	Cannon & Pickering 1918	TICv8
4850	0.77	0.72	8.60	0.23	—	24.33	Howard et al. 2011	TICv8
4849.9	0.79	0.76	—	-0.54	—	24.33	TICv8	TICv8

HD 156668

Adopted host values from one source row

Radius against the Sun

Known planets

HD 156668 b

HD 156668 c

HD 156668 and Its Two Known Planets

Underlying measurements and references