Stellar HostProfile

HD 181720

G1 V • 60.20 pc

Records

literature rows

Planets

system count

References

distinct source labels

TIC: TIC 112243062HIP: HIP 95262HD: HD 181720

Approximate color

from effective temperature

Stellar source: Santos et al. 2010 • System source: TICv8

Temperature

5781 K

5736 to 5864

4 values • 4 distinct

Mass

0.92 Msun

0.92 to 1.04

3 values • 3 distinct

Radius

1.39 Rsun

1.39 to 1.51

4 values • 4 distinct

Luminosity

0.29 log(Lsun)

0.29 to 0.36

3 values • 3 distinct

Distance

60.20 pc

single adopted value

9 values • 1 distinct

Spectral Type

G1 V

Multiple classifications reported

G1 V (2), G0 (1)

Planets

Stable across source rows

Sun

1.0 R☉ baseline

HD 181720

1.39 R☉

Discovery

2009

Period

956 days

Radius

—

Mass

127.1 M⊕

Eq. Temp

—

HD 181720 and Its Lone Known Planet

HD 181720 is a G-type dwarf star 196 light-years away, with a reported mass of 0.92 solar masses, a radius of 1.39 solar radii, and a temperature of 5780 K. Both its mass and radius are compared with the Sun's: the mass estimate is smaller, while the radius estimate is larger. One planet has been found orbiting this host.

That planet, HD 181720 b, was discovered in 2009 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. Its minimum mass is 127 Earth masses, a lower bound larger than Earth's, and it completes one orbit every 956 days.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

9 values • 1 distinct

Parallaxstable

9 values • 1 distinct

Temperaturedisputed

4 values • 4 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

4 values • 4 distinct

Luminositydisputed

3 values • 3 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
5864	—	1.47	—	0.36	—	60.20	Gaia DR2	TICv8
5784.6	1.04	1.51	—	0.36	—	60.20	TICv8	TICv8
—	—	—	—	—	—	60.20	Wright et al. 2004	TICv8
5736	1.03	1.50	—	—	—	60.20	Stassun et al. 2017	TICv8
—	—	—	—	—	—	60.20	Nordstrom et al. 2004	TICv8
—	—	—	—	—	—	60.20	Henry et al. 1996	TICv8
—	—	—	—	—	G1 V	60.20	Michigan Catalog, Vol. 3	TICv8
—	—	—	—	—	G0	60.20	Cannon & Pickering 1918	TICv8
5781	0.92	1.39	—	0.29	G1 V	60.20	Santos et al. 2010	TICv8

HD 181720

Adopted host values from one source row

Radius against the Sun

Known planets

HD 181720 b

HD 181720 and Its Lone Known Planet

Underlying measurements and references