Mass
0.45 Msun
0.45 to 0.45
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Stellar HostProfile
GJ 3634
M2.5 • 20.38 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 49064384
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: Bonfils et al. 2011 • System source: TICv8
Radius
0.43 Rsun
0.43 to 0.46
Age
5 Gyr
single adopted value
Luminosity
-1.70 log(Lsun)
-1.70 to -1.54
Distance
20.38 pc
single adopted value
Spectral Type
M2.5
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.43 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
GJ 3634
0.43 R☉
System Layout
Known planets
1 planets linked to this host
GJ 3634 b
Radial Velocity
◌
Discovery
2010
Period
2.65 days
Radius
—
Mass
8.40 M⊕
Eq. Temp
—
GJ 3634 and Its Planet
GJ 3634 is an M2.5 star 66.5 light-years away with one known planet. Its spectral type marks it as an M-type dwarf, a small, cool red dwarf. The star is 5 billion years old, with a mass of 0.45 solar masses and a radius of 0.43 solar radii. Both its reported mass estimate and its reported radius estimate are smaller than the Sun's.
The planet, GJ 3634 b, was discovered in 2010 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. GJ 3634 b has a mass of 8.4 Earth masses, larger than Earth's, and an orbital period of 2.65 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitystable
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | M2.5 | 20.38 | Hawley et al. 1996 | TICv8 |
| 3517 | 0.45 | 0.46 | — | -1.54 | — | 20.38 | TICv8 | TICv8 |
| 3685.0 | — | — | — | — | — | 20.38 | Gaia DR2 | TICv8 |
| — | 0.45 | 0.43 | 5 | -1.70 | M2.5 | 20.38 | Bonfils et al. 2011 | TICv8 |