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Stellar HostProfile

HD 22781

K1 • 32.60 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

HD: HD 22781TIC: TIC 101166776HIP: HIP 17187

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: Díaz et al. 2012 • System source: TICv8

Temperature

5027 K

5027 to 5091

3 values • 3 distinct

Mass

0.75 Msun

0.75 to 0.85

2 values • 2 distinct

Age

4.80 Gyr

single adopted value

1 values • 1 distinct

Distance

32.60 pc

single adopted value

4 values • 1 distinct

Spectral Type

K1

Multiple classifications reported

K0 (1), K1 (1)

Planets

1

Stable across source rows

1

System Layout

Known planets

1 planets linked to this host

HD 22781 b

Radial Velocity

◌

Discovery

2011

Period

528.1 days

Radius

—

Mass

4338.2 M⊕

Eq. Temp

—

HD 22781 and Its One Known Planet

HD 22781 is a K1 star located 106 light-years away. Its reported mass is 0.75 solar masses, smaller than the Sun's, and its reported temperature of 5030 K is cooler than the Sun's. The star is estimated to be 4.8 billion years old. One planet is known to orbit it.

HD 22781 b was discovered in 2011 using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. The planet has a minimum mass of 4340 Earth masses, meaning its true mass is at least this much, and an orbital period of 528 days. Its minimum mass is larger than Earth's and roughly 13.7 times Jupiter's mass.

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

3 values • 3 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

2 values • 2 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typedisputed

2 values • 2 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
50690.850.75—-0.47—32.60TICv8TICv8
—————K032.60Cannon & Pickering 1918TICv8
50270.75—4.80—K132.60Díaz et al. 2012TICv8
5091—0.74—-0.48—32.60Gaia DR2TICv8