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Stellar HostProfile

HD 18599

K2 V • 38.57 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

HIP: HIP 13754HD: HD 18599TIC: TIC 207141131

Approximate color

from effective temperature

Canonical Summary

Adopted host values from one source row

Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.

Stellar source: Desidera et al. 2023 • System source: TICv8

Temperature

5145 K

5058 to 5145

4 values • 4 distinct

Mass

0.86 Msun

0.81 to 0.86

3 values • 3 distinct

Radius

0.77 Rsun

0.77 to 0.80

4 values • 3 distinct

Age

0.40 Gyr

0.30 to 0.40

2 values • 2 distinct

Luminosity

-0.43 log(Lsun)

-0.43 to -0.41

2 values • 2 distinct

Distance

38.57 pc

single adopted value

4 values • 1 distinct

Spectral Type

K2 V

Consistent across records

K2 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.77 R☉ • circles scaled linearly by radius

Sun

1.0 R☉ baseline

HD 18599

0.77 R☉

System Layout

Known planets

1 planets linked to this host

HD 18599 b

Transit

◌

Discovery

2022

Period

4.14 days

Radius

2.60 R⊕

Mass

24.10 M⊕

Eq. Temp

—

HD 18599 and Its Neptune-like Planet

HD 18599 is a K-type main-sequence dwarf, a spectral class cooler and redder than the Sun's G type. It lies 126 light-years away. One known planet orbits this host.

The host star's age is 0.4 billion years, its mass is 0.863 solar masses, its radius is 0.767 solar radii, and its temperature is 5150 K. The star's reported mass estimate is smaller than the Sun's, its reported radius estimate is smaller than the Sun's, and its reported temperature is cooler than the Sun's.

The planet HD 18599 b was found by the transit method in 2022, when it was detected passing in front of its star and dimming its light. It is a Neptune-like world with a radius of 2.6 Earth radii, larger than Earth's, and a mass of 24.1 Earth masses, also larger than Earth's. Its orbital period is 4.14 days, and its mean density is 7.56 g/cm³, 1.37 times Earth's.

Provenance

Underlying measurements and references

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Evidence Summary

Rows

4

Stellar refs

4

System refs

1

Distancestable

4 values • 1 distinct

Parallaxstable

4 values • 1 distinct

Temperaturedisputed

4 values • 4 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

4 values • 3 distinct

Agedisputed

2 values • 2 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

4 values • 4 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
51450.860.770.40-0.43K2 V38.57Desidera et al. 2023TICv8
5058—0.80———38.57ExoFOPTICv8
50810.850.80—-0.41—38.57TICv8TICv8
50830.810.800.30——38.57Vines et al. 2023TICv8