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Stellar HostProfile

GJ 3998

M1 • 18.15 pc

Records

6

literature rows

Planets

3

system count

References

7

distinct source labels

HIP: HIP 84460TIC: TIC 459558974

Approximate color

from effective temperature

Canonical Summary

Adopted host values from all rows

Numeric fields use the median of non-null measurements. Disagreement stays visible through ranges, counts, and provenance.

Temperature

3722 K

3611 to 3889

5 values • 5 distinct

Mass

0.51 Msun

0.45 to 0.52

4 values • 4 distinct

Radius

0.51 Rsun

0.49 to 0.54

4 values • 4 distinct

Age

8.38 Gyr

single adopted value

1 values • 1 distinct

Luminosity

-1.37 log(Lsun)

-1.40 to -1.36

4 values • 4 distinct

Distance

18.15 pc

single adopted value

6 values • 1 distinct

Spectral Type

M1

Multiple classifications reported

M1 (2), M2.5 (1)

Planets

3

Stable across source rows

3

System Layout

Known planets

3 planets linked to this host

GJ 3998 b

Radial Velocity

Discovery

2016

Period

2.65 days

Radius

Mass

2.50 M⊕

Eq. Temp

GJ 3998 c

Radial Velocity

Discovery

2016

Period

13.73 days

Radius

Mass

6.82 M⊕

Eq. Temp

GJ 3998 d

Radial Velocity

Discovery

2025

Period

41.78 days

Radius

Mass

6.07 M⊕

Eq. Temp

Provenance

Underlying measurements and references

Evidence Summary

Rows

6

Stellar refs

6

System refs

1

Distancestable

6 values • 1 distinct

Parallaxstable

6 values • 1 distinct

Temperaturedisputed

5 values • 5 distinct

Massdisputed

4 values • 4 distinct

Radiusdisputed

4 values • 4 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

4 values • 4 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typedisputed

3 values • 2 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
388918.15Gaia DR2TICv8
36110.450.54-1.40M2.518.15Turnbull 2015TICv8
37220.500.49-1.39M118.15Affer et al. 2016TICv8
M118.15Hawley et al. 1996TICv8
36670.520.52-1.3618.15TICv8TICv8
37260.520.508.38-1.3618.15Stefanov et al. 2025TICv8