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Stellar HostProfile

GJ 3988

M4.5 V • 9.91 pc

Records

2

literature rows

Planets

1

system count

References

3

distinct source labels

TIC: TIC 274626553

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: Gorrini et al. 2023 • System source: TICv8

Temperature

3273 K

3103 to 3273

2 values • 2 distinct

Mass

0.18 Msun

0.18 to 0.18

2 values • 2 distinct

Radius

0.20 Rsun

0.20 to 0.22

2 values • 2 distinct

Luminosity

-2.40 log(Lsun)

-2.41 to -2.40

2 values • 2 distinct

Distance

9.91 pc

single adopted value

2 values • 1 distinct

Spectral Type

M4.5 V

Consistent across records

M4.5 V (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.20 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

GJ 3988

0.20 R☉

System Layout

Known planets

1 planets linked to this host

GJ 3988 b

Radial Velocity

◌

Discovery

2023

Period

6.94 days

Radius

—

Mass

3.69 M⊕

Eq. Temp

348 K

GJ 3988 b: A Close-Ranging Planet Around a Small Red Dwarf

GJ 3988 is an M4.5 V star, a small, cool red dwarf, located 32.3 light-years away. Its mass is 0.184 solar masses and its radius is 0.197 solar radii, both smaller than the Sun's corresponding values. Its temperature is 3270 K, cooler than the Sun's. One planet has been found orbiting this star.

That planet, GJ 3988 b, was discovered in 2023 using the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. GJ 3988 b has a minimum mass of 3.69 Earth masses, larger than Earth's, meaning its true mass is at least this value. Its orbital period is 6.94 days, so it completes one orbit in under a week.

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

2

Stellar refs

2

System refs

1

Distancestable

2 values • 1 distinct

Parallaxstable

2 values • 1 distinct

Temperaturedisputed

2 values • 2 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

2 values • 2 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
32730.180.20—-2.40M4.5 V9.91Gorrini et al. 2023TICv8
31030.180.22—-2.41—9.91TICv8TICv8