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Stellar HostProfile

GJ 3942

M0 • 16.93 pc

Records

5

literature rows

Planets

1

system count

References

6

distinct source labels

HIP: HIP 79126TIC: TIC 162494287

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: Perger et al. 2017 • System source: TICv8

Temperature

3867 K

3758 to 3873.6

4 values • 4 distinct

Mass

0.63 Msun

0.50 to 0.63

3 values • 3 distinct

Radius

0.61 Rsun

0.57 to 0.61

4 values • 3 distinct

Luminosity

-1.12 log(Lsun)

-1.21 to -1.12

4 values • 4 distinct

Distance

16.93 pc

single adopted value

5 values • 1 distinct

Spectral Type

M0

Consistent across records

M0 (3)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.61 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

GJ 3942

0.61 R☉

System Layout

Known planets

1 planets linked to this host

GJ 3942 b

Radial Velocity

◌

Discovery

2017

Period

6.91 days

Radius

—

Mass

7.14 M⊕

Eq. Temp

590 K

GJ 3942 and Its Lone Known Planet

GJ 3942 is an M0 star 55.2 light-years away. An M-type dwarf is a small, cool red dwarf, and this one has a mass of 0.63 solar masses, a radius of 0.61 solar radii, and a temperature of 3870 K. Its reported mass and radius estimates are smaller than the Sun's, and its temperature is cooler.

One known planet orbits this host: GJ 3942 b, found in 2017 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. The planet's minimum mass, a lower bound on its true mass, is 7.14 Earth masses, larger than Earth's. It completes an orbit in 6.91 days.

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

5

Stellar refs

5

System refs

1

Distancestable

5 values • 1 distinct

Parallaxstable

5 values • 1 distinct

Temperaturedisputed

4 values • 4 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

4 values • 3 distinct

Luminositydisputed

4 values • 4 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typestable

3 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
—————M016.93Hawley et al. 1996TICv8
37950.570.58—-1.21—16.93TICv8TICv8
3873.6—0.57—-1.17—16.93Gaia DR2TICv8
38670.630.61—-1.12M016.93Perger et al. 2017TICv8
37580.500.61—-1.16M016.93Turnbull 2015TICv8