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Stellar HostProfile

KELT-9

B9.5-A0 • 204.5 pc

Records

6

literature rows

Planets

1

system count

References

7

distinct source labels

HIP: HIP 101252TIC: TIC 16740101HD: HD 195689

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: Gaudi et al. 2017 • System source: TICv8

Temperature

10170 K

9435 to 10170

4 values • 3 distinct

Mass

2.52 Msun

1.98 to 2.52

3 values • 3 distinct

Radius

2.36 Rsun

2.18 to 2.36

4 values • 3 distinct

Age

0.30 Gyr

single adopted value

1 values • 1 distinct

Luminosity

1.72 log(Lsun)

1.59 to 1.72

2 values • 2 distinct

Distance

204.5 pc

single adopted value

6 values • 1 distinct

Spectral Type

B9.5-A0

Multiple classifications reported

A0 (1), B9.5-A0 (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 2.36 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

KELT-9

2.36 R☉

System Layout

Known planets

1 planets linked to this host

KELT-9 b

Transit

◌

Discovery

2017

Period

1.48 days

Radius

21.20 R⊕

Mass

915.4 M⊕

Eq. Temp

4050 K

KELT-9 and Its Planet

KELT-9 is a star 667 light-years away with a spectral type of A. Its reported mass estimate is 2.32 solar masses, its radius 2.42 solar radii, and its temperature 9270 K, all larger or hotter than the Sun. The star's age is 0.45 billion years. One planet is known to orbit it.

That planet is KELT-9 b, a Jupiter-like world discovered by transit in 2017. Its radius is 21.7 Earth radii and its mass is 915 Earth masses, which is roughly 2.88 times Jupiter's mass and larger than Earth's in both respects. KELT-9 b orbits its star in 1.48 days. Its mean density is 0.494 g/cm³, 0.0896 times Earth's.

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

6

Stellar refs

6

System refs

1

Distancestable

6 values • 1 distinct

Parallaxstable

6 values • 1 distinct

Temperaturedisputed

4 values • 3 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

4 values • 3 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typedisputed

2 values • 2 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
9435—2.29———204.5ExoFOPTICv8
9435—————204.5Gaia DR2TICv8
101702.522.360.301.72B9.5-A0204.5Gaudi et al. 2017TICv8
—1.982.18———204.5Hoeijmakers et al. 2019TICv8
—————A0204.5Cannon & Pickering 1918TICv8
95502.432.29—1.59—204.5TICv8TICv8