Back to Stellar Hosts
Stellar HostProfile

K2-18

M2.5 V • 38.03 pc

Records

13

literature rows

Planets

2

system count

References

14

distinct source labels

TIC: TIC 388804061

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

3457 K

3440 to 3856.2

11 values • 7 distinct

Mass

0.39 Msun

0.32 to 0.50

8 values • 6 distinct

Radius

0.41 Rsun

0.25 to 0.47

11 values • 8 distinct

Luminosity

-1.59 log(Lsun)

-1.60 to -1.59

2 values • 2 distinct

Distance

38.03 pc

single adopted value

13 values • 1 distinct

Spectral Type

M2.5 V

Consistent across records

M2.5 V (1)

Planets

2

Stable across source rows

2

System Layout

Known planets

2 planets linked to this host

K2-18 b

Transit

Discovery

2015

Period

32.94 days

Radius

2.46 R⊕

Mass

7.20 M⊕

Eq. Temp

281 K

K2-18 c

Radial Velocity

Discovery

2017

Period

8.96 days

Radius

Mass

7.51 M⊕

Eq. Temp

363 K

Provenance

Underlying measurements and references

Evidence Summary

Rows

13

Stellar refs

13

System refs

1

Distancestable

13 values • 1 distinct

Parallaxstable

13 values • 1 distinct

Temperaturedisputed

11 values • 7 distinct

Massdisputed

8 values • 6 distinct

Radiusdisputed

11 values • 8 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

4 values • 3 distinct

Metallicitydisputed

4 values • 4 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
34960.420.4038.03Crossfield et al. 2016TICv8
34570.500.44-1.6038.03Benneke et al. 2019TICv8
38.03Barros et al. 2016TICv8
0.2538.03Kruse et al. 2019TICv8
34570.360.4138.03Cloutier et al. 2017TICv8
35030.410.3938.03Montet et al. 2015TICv8
34400.3638.03Vanderburg et al. 2016TICv8
34640.4438.03ExoFOPTICv8
34640.440.44-1.5938.03TICv8TICv8
34490.320.4738.03Howard et al. 2025TICv8
3856.238.03Gaia DR2TICv8
34570.360.4138.03Sarkis et al. 2018TICv8
34570.360.41M2.5 V38.03Benneke et al. 2017TICv8