Temperature
3250 K
2949 to 3438.1
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Stellar HostProfile
GJ 1214
M4 V • 14.64 pc
Records
18
literature rows
Planets
1
system count
References
18
distinct source labels
TIC: TIC 467929202
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: Cloutier et al. 2021 • System source: TICv8
Mass
0.18 Msun
0.15 to 0.18
Radius
0.21 Rsun
0.18 to 0.22
Luminosity
-2.34 log(Lsun)
-2.55 to -2.31
Distance
14.64 pc
single adopted value
Spectral Type
M4 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.21 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
GJ 1214
0.21 R☉
System Layout
Known planets
1 planets linked to this host
GJ 1214 b
Transit
◌
Discovery
2009
Period
1.58 days
Radius
2.73 R⊕
Mass
8.41 M⊕
Eq. Temp
567 K
GJ 1214 and Its Neptune-Like Planet
GJ 1214 is an M4 V star, an M-type dwarf that is small and cool compared with the Sun. It lies 47.8 light-years away. Its mass is 0.178 solar masses, its radius is 0.215 solar radii, and its temperature is 3250 K; all three estimates fall below the corresponding solar values. One known planet orbits this star.
That planet, GJ 1214 b, was discovered in 2009 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Repeated dips help establish its orbital period of 1.58 days. Its radius is 2.73 Earth radii, which is larger than Earth's and places it in the Neptune-like size class, a grouping that reaches four times Earth's radius. Its mass is 8.41 Earth masses, larger than Earth's, and its mean density is 2.27 g/cm³, 0.412 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
18
Stellar refs
17
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | 0.20 | — | — | — | 14.64 | Sada et al. 2010 | TICv8 |
| 3101 | 0.18 | 0.22 | — | -2.41 | — | 14.64 | Mahajan et al. 2024 | TICv8 |
| — | — | — | — | — | M4.5 | 14.64 | Hawley et al. 1996 | TICv8 |
| 2949 | 0.15 | 0.21 | — | -2.55 | — | 14.64 | Kundurthy et al. 2011 | TICv8 |
| 3026 | 0.16 | 0.21 | — | -2.48 | — | 14.64 | Charbonneau et al. 2009 | TICv8 |
| 3250 | 0.18 | 0.22 | — | -2.31 | — | 14.64 | Gillon et al. 2014 | TICv8 |
| 3170 | 0.16 | 0.18 | — | — | — | 14.64 | Carter et al. 2011 | TICv8 |
| 3000 | — | — | — | — | — | 14.64 | Croll et al. 2011 | TICv8 |
| 3000 | — | — | — | — | — | 14.64 | Narita et al. 2013 | TICv8 |
| 3438.1 | — | — | — | — | — | 14.64 | Gaia DR2 | TICv8 |
| — | 0.16 | 0.21 | — | — | — | 14.64 | Carter et al. 2011 | TICv8 |
| 3026 | 0.15 | 0.22 | — | — | — | 14.64 | Harpsøe et al. 2013 | TICv8 |
| 3026 | — | — | — | — | — | 14.64 | Yalçınkaya et al. 2024 | TICv8 |
| 3026 | — | 0.20 | — | — | — | 14.64 | Berta et al. 2012 | TICv8 |
| 3250 | 0.18 | 0.21 | — | -2.34 | M4 V | 14.64 | Cloutier et al. 2021 | TICv8 |
| — | 0.16 | 0.21 | 3 | — | — | 14.64 | Berta et al. 2011 | TICv8 |
| 3074 | 0.18 | 0.21 | — | -2.43 | — | 14.64 | TICv8 | TICv8 |
| 3026 | — | 0.21 | — | — | — | 14.64 | Bean et al. 2011 | TICv8 |