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Stellar HostProfile

HAT-P-57

A8 V • 279.9 pc

Records

5

literature rows

Planets

1

system count

References

6

distinct source labels

TIC: TIC 317520667

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: Hartman et al. 2015 • System source: TICv8

Temperature

7500 K

6330 to 7500

5 values • 4 distinct

Mass

1.47 Msun

1.47 to 2.77

3 values • 3 distinct

Radius

1.50 Rsun

1.50 to 1.85

5 values • 4 distinct

Age

1 Gyr

single adopted value

1 values • 1 distinct

Luminosity

0.81 log(Lsun)

0.59 to 0.81

3 values • 3 distinct

Distance

279.9 pc

single adopted value

5 values • 1 distinct

Spectral Type

A8 V

Consistent across records

A8 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 1.50 R☉ • circles scaled linearly by radius

Sun

1.0 R☉ baseline

HAT-P-57

1.50 R☉

System Layout

Known planets

1 planets linked to this host

HAT-P-57 b

Transit

◌

Discovery

2015

Period

2.47 days

Radius

19.50 R⊕

Mass

448.1 M⊕

Eq. Temp

—

HAT-P-57 b: A Giant Planet Orbiting a Hot, Massive Star

HAT-P-57 is an A8 V star located 913 light-years away, with a mass of 1.47 solar masses and a radius of 1.5 solar radii. Its temperature is 7500 K, and it is 1 billion years old. The star's reported mass, radius, and temperature estimates are all larger or hotter than the Sun's. One planet is known to orbit this host.

That planet, HAT-P-57 b, is a Jupiter-like world discovered by transit in 2015. Its radius of 19.5 Earth radii is larger than Earth's, and its mean density is 0.333 g/cm³, 0.0604 times Earth's. It completes an orbit every 2.47 days and has a mass of 448 Earth masses.

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

5

Stellar refs

5

System refs

1

Distancestable

5 values • 1 distinct

Parallaxstable

5 values • 1 distinct

Temperaturedisputed

5 values • 4 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

5 values • 4 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

4 values • 3 distinct

Metallicitystable

2 values • 1 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
75001.471.5010.81A8 V279.9Hartman et al. 2015TICv8
6549.4—1.54—0.59—279.9Gaia DR2TICv8
68481.481.52—0.66—279.9TICv8TICv8
63302.771.85———279.9Stassun et al. 2017TICv8
6848—1.52———279.9ExoFOPTICv8