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Stellar HostProfile

K2-137

M3 V • 98.88 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

TIC: TIC 98720702

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: Smith et al. 2018 • System source: TICv8

Temperature

3492 K

3359 to 3697

4 values • 4 distinct

Mass

0.46 Msun

0.46 to 0.46

2 values • 2 distinct

Radius

0.44 Rsun

0.29 to 0.53

4 values • 4 distinct

Distance

98.88 pc

single adopted value

4 values • 1 distinct

Spectral Type

M3 V

Consistent across records

M3 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.44 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

K2-137

0.44 R☉

System Layout

Known planets

1 planets linked to this host

K2-137 b

Transit

◌

Discovery

2017

Period

0.18 days

Radius

0.64 R⊕

Mass

—

Eq. Temp

—

K2-137: A Cool Red Dwarf and Its Sub-Earth Companion

K2-137 is an M3 V star, a small, cool red dwarf, located 322 light-years away. Its mass is 0.463 solar masses, its radius is 0.442 solar radii, and its temperature is 3490 K. Each of these values is smaller or cooler than the corresponding value for the Sun. One known planet orbits this star.

That planet is K2-137 b, a Sub-Earth discovered by transit in 2017. Its radius is 0.64 Earth radii, smaller than Earth's, and its orbital period is 0.18 days.

Provenance

Underlying measurements and references

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Evidence Summary

Rows

4

Stellar refs

4

System refs

1

Distancestable

4 values • 1 distinct

Parallaxstable

4 values • 1 distinct

Temperaturedisputed

4 values • 4 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

4 values • 4 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
34920.460.44——M3 V98.88Smith et al. 2018TICv8
3359—0.53—-1.48—98.88Gaia DR2TICv8
3697—0.29———98.88Adams et al. 2021TICv8
34500.460.46—-1.57—98.88TICv8TICv8