Stellar HostProfile

HD 18143

K2 • 22.52 pc

Records

literature rows

Planets

system count

References

distinct source labels

HIP: HIP 13642 ATIC: TIC 436933294HD: HD 18143

Approximate color

from effective temperature

Stellar source: Turnbull 2015 • System source: TICv8

Temperature

5148 K

5078 to 5148

2 values • 2 distinct

Mass

0.90 Msun

0.85 to 0.90

4 values • 2 distinct

Radius

0.87 Rsun

0.87 to 0.89

3 values • 2 distinct

Age

9.40 Gyr

8.68 to 9.40

2 values • 2 distinct

Luminosity

-0.26 log(Lsun)

-0.32 to -0.26

2 values • 2 distinct

Distance

22.52 pc

single adopted value

10 values • 1 distinct

Spectral Type

Multiple classifications reported

G5 (1), K2 (1), K2 IV (1)

Planets

Stable across source rows

Sun

1.0 R☉ baseline

HD 18143

0.87 R☉

Discovery

2022

Period

10.29 days

Radius

—

Mass

10.81 M⊕

Eq. Temp

—

Discovery

2022

Period

2.90e4 days

Radius

—

Mass

3177.6 M⊕

Eq. Temp

—

HD 18143 and Its Two Known Planets

HD 18143 is a K2 star 73.5 light-years away with two planets orbiting it. The star is 9.4 billion years old, holds 0.9 solar masses, spans 0.87 solar radii, and has a temperature of 5150 K. Its mass and radius are smaller than the Sun's, and its temperature is cooler.

Both planets were found in 2022 using the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. HD 18143 b has a minimum mass of 10.8 Earth masses, meaning its true mass is at least that much, and it completes an orbit every 10.3 days, the shortest period among the listed planets. HD 18143 b's minimum mass is larger than Earth's. HD 18143 c carries a mass of 3180 Earth masses, roughly 10 times Jupiter's mass and larger than Earth's, and its orbital period is 29000 days, the longest among the listed planets.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

10 values • 1 distinct

Parallaxstable

10 values • 1 distinct

Temperaturedisputed

2 values • 2 distinct

Massdisputed

4 values • 2 distinct

Radiusdisputed

3 values • 2 distinct

Agedisputed

2 values • 2 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

3 values • 2 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typedisputed

3 values • 3 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
—	0.90	0.87	8.68	—	—	22.52	Takeda et al. 2007	TICv8
5148	0.90	0.87	9.40	-0.26	K2	22.52	Turnbull 2015	TICv8
—	0.85	—	—	—	—	22.52	Feng et al. 2022	TICv8
—	—	—	—	—	K2 IV	22.52	Gray et al. 2003	TICv8
—	—	—	—	—	—	22.52	Valenti & Fischer 2005	TICv8
—	—	—	—	—	G5	22.52	Cannon & Pickering 1918	TICv8
—	—	—	—	—	—	22.52	Nidever et al. 2002	TICv8
—	—	—	—	—	—	22.52	Duncan et al. 1991	TICv8
5078	0.85	0.89	—	-0.32	—	22.52	TICv8	TICv8
—	—	—	—	—	—	22.52	Wright et al. 2004	TICv8

HD 18143

Adopted host values from one source row

Radius against the Sun

Known planets

HD 18143 b

HD 18143 c

HD 18143 and Its Two Known Planets

Underlying measurements and references