Temperature
3347 K
3158 to 3347
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Stellar HostProfile
HN Lib
M4.0 V • 6.24 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HIP: HIP 71253TIC: TIC 294401924
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: González-Álvarez et al. 2023 • System source: TICv8
Mass
0.29 Msun
0.29 to 0.32
Radius
0.30 Rsun
0.30 to 0.36
Age
4.40 Gyr
single adopted value
Luminosity
-2.00 log(Lsun)
-2.02 to -2.00
Distance
6.24 pc
single adopted value
Spectral Type
M4.0 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.30 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HN Lib
0.30 R☉
System Layout
Known planets
1 planets linked to this host
HN Lib b
Radial Velocity
◌
Discovery
2023
Period
36.12 days
Radius
—
Mass
5.46 M⊕
Eq. Temp
234.4 K
HN Lib b: A Nearby Red Dwarf and Its Planet
HN Lib is a red dwarf of spectral type M4.0 V located 20.4 light-years from Earth. The star has a mass of 0.291 solar masses and a radius of 0.299 solar radii, both smaller than the Sun's corresponding values. Its temperature of 3350 K is cooler than the Sun's, and its age is 4.4 billion years. One planet is known to orbit this host.
That planet, HN Lib b, was discovered in 2023 using the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. The planet has a minimum mass of 5.46 Earth masses, larger than Earth's, and an orbital period of 36.1 days. Because this is a minimum mass, it represents a lower bound on the planet's true mass.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3158 | 0.32 | 0.36 | — | -2 | M4.0V | 6.24 | Turnbull 2015 | TICv8 |
| — | — | — | — | — | — | 6.24 | Nidever et al. 2002 | TICv8 |
| — | — | — | — | — | — | 6.24 | Wright et al. 2004 | TICv8 |
| — | — | — | — | — | M4 | 6.24 | Hawley et al. 1996 | TICv8 |
| 3347 | 0.29 | 0.30 | 4.40 | -2.00 | M4.0 V | 6.24 | González-Álvarez et al. 2023 | TICv8 |
| 3215 | 0.29 | 0.32 | — | -2.02 | — | 6.24 | TICv8 | TICv8 |