Stellar HostProfile

HD 18742

Unclassified star • 162.7 pc

Records

literature rows

Planets

system count

References

distinct source labels

HD: HD 18742TIC: TIC 71345433HIP: HIP 13993

Approximate color

from effective temperature

Stellar source: Jofré et al. 2015 • System source: TICv8

Temperature

5021 K

4940 to 5048

7 values • 5 distinct

Mass

1.48 Msun

1.36 to 2.58

5 values • 5 distinct

Radius

4.08 Rsun

4.08 to 6.34

6 values • 6 distinct

Age

2.49 Gyr

2.30 to 2.49

2 values • 2 distinct

Luminosity

1.12 log(Lsun)

1.12 to 1.32

3 values • 3 distinct

Distance

162.7 pc

single adopted value

9 values • 1 distinct

Planets

Stable across source rows

Sun

1.0 R☉ baseline

HD 18742

4.08 R☉

Discovery

2011

Period

766 days

Radius

—

Mass

1080.6 M⊕

Eq. Temp

—

HD 18742 and Its Planet

HD 18742 is a star 531 light-years away with a spectral type of G0. It has an age of 2.49 billion years, a mass of 1.48 solar masses, a radius of 4.08 solar radii, and a temperature of 5020 K. Its reported mass and radius estimates are larger than the Sun's, while its reported temperature is cooler than the Sun's. One planet orbits this host.

That planet, HD 18742 b, was discovered in 2011 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. It has a minimum mass of 1080 Earth masses, a lower bound on its true mass that is larger than Earth's and roughly 3.4 times Jupiter's mass. Its orbital period is 766 days.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

9 values • 1 distinct

Parallaxstable

9 values • 1 distinct

Temperaturedisputed

7 values • 5 distinct

Massdisputed

5 values • 5 distinct

Radiusdisputed

6 values • 6 distinct

Agedisputed

2 values • 2 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

5 values • 4 distinct

Metallicitydisputed

5 values • 5 distinct

Spectral Typedisputed

2 values • 2 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
—	—	—	—	—	G0	162.7	Cannon & Pickering 1918	TICv8
5048	1.60	4.90	2.30	1.14	—	162.7	Johnson et al. 2011	TICv8
5016	1.73	—	—	—	—	162.7	Mortier et al. 2013	TICv8
4940	1.36	5.13	—	—	—	162.7	Luhn et al. 2019	TICv8
5021	2.58	5.88	—	—	—	162.7	Stassun et al. 2017	TICv8
5047	—	5.94	—	1.32	—	162.7	Gaia DR2	TICv8
4940	—	6.34	—	—	—	162.7	TICv8	TICv8
5021	1.48	4.08	2.49	1.12	—	162.7	Jofré et al. 2015	TICv8
—	—	—	—	—	G8/K0 IV	162.7	Michigan Catalog, Vol. 4	TICv8

HD 18742

Adopted host values from one source row

Radius against the Sun

Known planets

HD 18742 b

HD 18742 and Its Planet

Underlying measurements and references