←Back to Stellar Hosts
Stellar HostProfile

Qatar-4

K1 V • 329.0 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

TIC: TIC 440113053

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: Alsubai et al. 2017 • System source: TICv8

Temperature

5215 K

4953.7 to 5215

4 values • 3 distinct

Mass

0.90 Msun

0.85 to 0.90

2 values • 2 distinct

Radius

0.85 Rsun

0.82 to 0.85

4 values • 3 distinct

Age

0.17 Gyr

single adopted value

1 values • 1 distinct

Luminosity

-0.32 log(Lsun)

-0.40 to -0.32

3 values • 3 distinct

Distance

329.0 pc

single adopted value

4 values • 1 distinct

Spectral Type

K1 V

Consistent across records

K1 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.85 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

Qatar-4

0.85 R☉

System Layout

Known planets

1 planets linked to this host

Qatar-4 b

Transit

◌

Discovery

2017

Period

1.81 days

Radius

12.72 R⊕

Mass

1938.8 M⊕

Eq. Temp

1385 K

Qatar-4 and Its Giant Planet

Qatar-4 is a K-type main-sequence dwarf 1070 light-years away, with a spectral type of K1 V. Its age is 0.17 billion years, its mass is 0.896 solar masses, its radius is 0.849 solar radii, and its temperature is 5220 K. The star's reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's. One planet is known to orbit this host.

That planet, Qatar-4 b, was discovered by the transit method in 2017. It is Jupiter-like, with a mass of 1940 Earth masses, a radius of 12.7 Earth radii, and an orbital period of 1.81 days. Its reported mass and radius estimates are larger than Earth's, and its mass is roughly 6.1 times Jupiter's mass. Its mean density is 5.19 g/cm³, 0.942 times Earth's.

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

4

Stellar refs

4

System refs

1

Distancestable

4 values • 1 distinct

Parallaxstable

4 values • 1 distinct

Temperaturedisputed

4 values • 3 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

4 values • 3 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
5090—0.82———329.0ExoFOPTICv8
4953.7—0.85—-0.40—329.0Gaia DR2TICv8
50900.850.82—-0.39—329.0TICv8TICv8
52150.900.850.17-0.32K1 V329.0Alsubai et al. 2017TICv8