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Stellar HostProfile

KELT-20

A2 V • 136.4 pc

Records

6

literature rows

Planets

1

system count

References

7

distinct source labels

HIP: HIP 96618TIC: TIC 69679391HD: HD 185603

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: Lund et al. 2017 • System source: TICv8

Temperature

8720 K

8720 to 9032

5 values • 5 distinct

Mass

1.76 Msun

1.76 to 2.28

3 values • 3 distinct

Radius

1.56 Rsun

1.56 to 1.62

4 values • 4 distinct

Age

0.60 Gyr

0.20 to 0.60

2 values • 2 distinct

Luminosity

1.10 log(Lsun)

1.10 to 1.20

2 values • 2 distinct

Distance

136.4 pc

single adopted value

6 values • 1 distinct

Spectral Type

A2 V

Multiple classifications reported

A0 (1), A2 (1), A2 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 1.56 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

KELT-20

1.56 R☉

System Layout

Known planets

1 planets linked to this host

KELT-20 b

Transit

◌

Discovery

2017

Period

3.47 days

Radius

19.51 R⊕

Mass

1074.9 M⊕

Eq. Temp

2262 K

KELT-20 b: A Jupiter-like World Around a Hot Star

KELT-20 is a single-star system 445 light-years from Earth with one known planet. The host star has a spectral type of A2 V, marking it as a hotter, more massive star than the Sun - its reported temperature of 8720 K, mass of 1.76 solar masses, and radius of 1.57 solar radii all exceed the Sun's corresponding values. The star's age carries a reported upper limit of 0.6 billion years.

Its sole known planet, KELT-20 b, was discovered in 2017 using the transit method, in which a planet passing in front of its star causes a small dip in observed brightness. Classified as Jupiter-like, KELT-20 b is a large world with a radius of 19.5 Earth radii - larger than Earth's - and a reported upper mass limit of 1074.90106 Earth masses. It completes one orbit in just 3.47 days.

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

5 values • 5 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

4 values • 4 distinct

Agedisputed

2 values • 2 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

4 values • 4 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typedisputed

3 values • 3 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
89801.891.600.20—A2136.4Talens et al. 2018TICv8
—————A0136.4Cannon & Pickering 1918TICv8
87201.761.560.601.10A2 V136.4Lund et al. 2017TICv8
8894.8—————136.4Gaia DR2TICv8
90322.281.62—1.20—136.4TICv8TICv8
8894.8—1.62———136.4ExoFOPTICv8