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Stellar HostProfile

tau Gem

K2 III • 112.5 pc

Records

4

literature rows

Planets

1

system count

References

5

distinct source labels

TIC: TIC 68984421HD: HD 54719HIP: HIP 34693

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: Mitchell et al. 2013 • System source: TICv8

Temperature

4388 K

4388 to 4482

3 values • 3 distinct

Mass

2.30 Msun

single adopted value

1 values • 1 distinct

Radius

26.80 Rsun

26.80 to 31.16

3 values • 3 distinct

Age

1.22 Gyr

single adopted value

1 values • 1 distinct

Distance

112.5 pc

single adopted value

4 values • 1 distinct

Spectral Type

K2 III

Multiple classifications reported

K0 (1), K2 III (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 26.80 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

tau Gem

26.80 R☉

System Layout

Known planets

1 planets linked to this host

tau Gem b

Radial Velocity

◌

Discovery

2013

Period

305.5 days

Radius

—

Mass

6547 M⊕

Eq. Temp

—

Tau Gem and Its Planet

Tau Gem is a K2 III star 367 light-years away. It is 1.22 billion years old, with a mass of 2.3 solar masses and a radius of 26.8 solar radii. Its temperature is 4390 K. One planet orbits this host.

That planet, tau Gem b, was found in 2013 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. Its orbital period is 306 days. Its minimum mass is 6550 Earth masses, larger than Earth's and roughly 20.6 times Jupiter's mass.

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

Massstable

1 values • 1 distinct

Radiusdisputed

3 values • 3 distinct

Agestable

1 values • 1 distinct

Luminositystable

1 values • 1 distinct

Surface Gravitystable

1 values • 1 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typedisputed

2 values • 2 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
4408.3—31.16—2.52—112.5Gaia DR2TICv8
43882.3026.801.22—K2 III112.5Mitchell et al. 2013TICv8
4482—28.72———112.5TICv8TICv8
—————K0112.5Cannon & Pickering 1918TICv8