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Stellar HostProfile

Kepler-257

Unclassified star • 780.3 pc

Records

28

literature rows

Planets

3

system count

References

15

distinct source labels

TIC: TIC 273132699

Approximate color

from effective temperature

Canonical Summary

Adopted host values from all rows

Numeric fields use the median of non-null measurements. Disagreement stays visible through ranges, counts, and provenance.

Temperature

5188 K

4880.6 to 5209

25 values • 8 distinct

Mass

0.87 Msun

0.74 to 0.92

18 values • 5 distinct

Radius

0.97 Rsun

0.75 to 1.16

25 values • 9 distinct

Age

14 Gyr

1.48 to 14

5 values • 3 distinct

Luminosity

-0.41 log(Lsun)

-0.44 to -0.38

2 values • 2 distinct

Distance

780.3 pc

single adopted value

28 values • 1 distinct

Planets

3

Stable across source rows

3

System Layout

Known planets

3 planets linked to this host

Kepler-257 b

Transit

Discovery

2014

Period

2.38 days

Radius

2.67 R⊕

Mass

Eq. Temp

1237 K

Kepler-257 c

Transit

Discovery

2014

Period

6.58 days

Radius

4.56 R⊕

Mass

Eq. Temp

881 K

Kepler-257 d

Transit

Discovery

2014

Period

24.66 days

Radius

5.34 R⊕

Mass

Eq. Temp

567 K

Provenance

Underlying measurements and references

Evidence Summary

Rows

28

Stellar refs

14

System refs

1

Distancestable

28 values • 1 distinct

Parallaxstable

28 values • 1 distinct

Temperaturedisputed

25 values • 8 distinct

Massdisputed

18 values • 5 distinct

Radiusdisputed

25 values • 9 distinct

Agedisputed

5 values • 3 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

23 values • 6 distinct

Metallicitydisputed

15 values • 4 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
51880.870.97780.3Q1-Q16 KOI TableTICv8
50580.740.7514780.3Q1-Q8 KOI TableTICv8
51880.870.97780.3Q1-Q17 DR24 KOI TableTICv8
51880.870.97780.3Q1-Q16 KOI TableTICv8
51180.920.801.48780.3Fulton & Petigura 2018TICv8
51880.870.97780.3Q1-Q17 DR25 KOI TableTICv8
51880.870.97780.3Q1-Q12 KOI TableTICv8
50580.740.7514780.3Q1-Q8 KOI TableTICv8
51801.04780.3Rowe et al. 2014TICv8
49980.90780.3Q1-Q6 KOI TableTICv8
51880.870.97780.3Q1-Q12 KOI TableTICv8
51880.870.97780.3Q1-Q16 KOI TableTICv8
780.3Q1-Q17 DR25 Supplemental KOI TableTICv8
49980.90780.3Q1-Q6 KOI TableTICv8
780.3Q1-Q17 DR25 Supplemental KOI TableTICv8
51880.870.97780.3Q1-Q17 DR25 KOI TableTICv8
49980.90780.3Q1-Q6 KOI TableTICv8
4880.60.84-0.44780.3Gaia DR2TICv8
51880.870.97780.3Q1-Q12 KOI TableTICv8
49980.90780.3Batalha et al. 2013TICv8
49720.820.87-0.38780.3TICv8TICv8
51880.870.97780.3Q1-Q17 DR24 KOI TableTICv8
780.3Q1-Q17 DR25 Supplemental KOI TableTICv8
49981.16780.3Latham et al. 2005TICv8
52090.850.814.79780.3Morton et al. 2016TICv8
51880.870.97780.3Q1-Q17 DR25 KOI TableTICv8
50580.740.7514780.3Q1-Q8 KOI TableTICv8
51880.870.97780.3Q1-Q17 DR24 KOI TableTICv8