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Stellar HostProfile

HD 221585

G8 IV • 55.85 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

HD: HD 221585HIP: HIP 116221TIC: TIC 270730826

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. 2016 • System source: TICv8

Temperature

5620 K

5535.3 to 5620

3 values • 3 distinct

Mass

1.19 Msun

0.97 to 1.19

2 values • 2 distinct

Age

6.20 Gyr

single adopted value

1 values • 1 distinct

Luminosity

0.42 log(Lsun)

0.42 to 0.46

3 values • 3 distinct

Distance

55.85 pc

single adopted value

4 values • 1 distinct

Spectral Type

G8 IV

Multiple classifications reported

G5 (1), G8 IV (1)

Planets

1

Stable across source rows

1

System Layout

Known planets

1 planets linked to this host

HD 221585 b

Radial Velocity

◌

Discovery

2016

Period

1173 days

Radius

—

Mass

511.7 M⊕

Eq. Temp

—

HD 221585 and Its Planet

HD 221585 is a G8 IV star 182 light-years away, with one known planet in orbit. The star is estimated to be 6.2 billion years old, with a mass of 1.19 solar masses and a temperature of 5620 K. Its reported mass estimate is larger than the Sun's, while its reported temperature is cooler than the Sun's.

The planet HD 221585 b was discovered in 2016 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. Its minimum mass is 512 Earth masses, a lower bound on its true mass, and its minimum mass is larger than Earth's and roughly 1.61 times Jupiter's mass. HD 221585 b takes 1170 days to complete one orbit.

Provenance

Underlying measurements and references

Download JSONDownload CSV

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

3 values • 3 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typedisputed

2 values • 2 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
5535.30.971.85—0.46—55.85TICv8TICv8
56201.19—6.200.42G8 IV55.85Díaz et al. 2016TICv8
5538.5—1.85—0.46—55.85Gaia DR2TICv8
—————G555.85Cannon & Pickering 1918TICv8