Stellar HostProfile

K2-218

Unclassified star • 394.1 pc

Records

literature rows

Planets

system count

References

distinct source labels

TIC: TIC 266014458

Approximate color

from effective temperature

Stellar source: Mayo et al. 2018 • System source: TICv8

Temperature

5757 K

5490.4 to 5757

3 values • 3 distinct

Mass

1.05 Msun

1.02 to 1.05

2 values • 2 distinct

Radius

1.01 Rsun

1.01 to 1.10

4 values • 4 distinct

Distance

394.1 pc

single adopted value

4 values • 1 distinct

Planets

Stable across source rows

Sun

1.0 R☉ baseline

K2-218

1.01 R☉

Discovery

2018

Period

8.68 days

Radius

2.57 R⊕

Mass

—

Eq. Temp

—

K2-218 and Its Neptune-Like Planet

K2-218 is a star 1290 light-years away with a mass of 1.05 solar masses and a radius of 1.01 solar radii. Its reported mass estimate is larger than the Sun's. The star has a temperature of 5760 K.

One planet orbits this host. K2-218 b is a Neptune-like planet discovered by transit in 2018. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. The planet completes an orbit every 8.68 days, and its radius is 2.57 Earth radii, larger than Earth's.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

4 values • 1 distinct

Parallaxstable

4 values • 1 distinct

Temperaturedisputed

3 values • 3 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

4 values • 4 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitystable

1 values • 1 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
5490.4	—	1.10	—	-2.84e-3	—	394.1	Gaia DR2	TICv8
5710	1.02	1.06	—	0.03	—	394.1	TICv8	TICv8
5757	1.05	1.01	—	—	—	394.1	Mayo et al. 2018	TICv8
—	—	1.10	—	—	—	394.1	Kruse et al. 2019	TICv8

K2-218

Adopted host values from one source row

Radius against the Sun

Known planets

K2-218 b

K2-218 and Its Neptune-Like Planet

Underlying measurements and references