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Stellar HostProfile

WISEP J121756.91+162640.2 A

T8.5

Records

1

literature rows

Planets

1

system count

References

2

distinct source labels

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: Leggett et al. 2014 • System source: Bouvier and Appenzeller 1992

Temperature

575 K

single adopted value

1 values • 1 distinct

Mass

0.03 Msun

single adopted value

1 values • 1 distinct

Radius

0.09 Rsun

single adopted value

1 values • 1 distinct

Age

6 Gyr

single adopted value

1 values • 1 distinct

Spectral Type

T8.5

Consistent across records

T8.5 (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.09 R☉ • circles scaled linearly by radius

Sun

1.0 R☉ baseline

WISEP J121756.91+162640.2 A

0.09 R☉

System Layout

Known planets

1 planets linked to this host

WISEP J121756.91+162640.2 A and Its Jupiter-like Companion

WISEP J121756.91+162640.2 A is the host star of a single known planet, a T8.5 object with a mass of 0.029 solar masses and a radius of 0.091 solar radii. Its temperature is 575 K, and its age is 6 billion years. The star's reported mass, radius, and temperature are all smaller or cooler than the Sun's.

The one planet discovered around this star is WISEP J121756.91+162640.2 A b, found by imaging in 2012. It is a Jupiter-like planet, a size class that describes a radius exceeding 4 times Earth's. Its radius is 10.5 Earth radii, larger than Earth's, and its mass is 6990 Earth masses, also larger than Earth's. That mass is roughly 22 times Jupiter's mass.

WISEP J121756.91+162640.2 A b has a mean density of 33.6 g/cm³, 6.1 times Earth's. No orbital period is reported for it.

Provenance

Underlying measurements and references

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Evidence Summary

Rows

1

Stellar refs

1

System refs

1

Temperaturestable

1 values • 1 distinct

Massstable

1 values • 1 distinct

Radiusstable

1 values • 1 distinct

Agestable

1 values • 1 distinct

Surface Gravitystable

1 values • 1 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
5750.030.096—T8.5—Leggett et al. 2014Bouvier and Appenzeller 1992