Barnard's star Overview
Barnard's star
0.19
R⦿
3271.00
K
Barnard d
Barnard b
Barnard c
Barnard e
- Architecture
- Barnard's star
- Barnard's star
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| Barnard's star | Barnard d | 2.34 d | > 0.26 M⨁ | Radial Velocity | 2025 | Basant et al. 2025 | Confirmed Planet |
| Barnard's star | Barnard b | 3.15 d | > 0.3 M⨁ | Radial Velocity | 2024 | Gonzalez Hernandez et al. 2024 | Confirmed Planet |
| Barnard's star | Barnard c | 4.12 d | > 0.34 M⨁ | Radial Velocity | 2025 | Basant et al. 2025 | Confirmed Planet |
| Barnard's star | Barnard e | 6.74 d | > 0.19 M⨁ | Radial Velocity | 2025 | Basant et al. 2025 | Confirmed Planet |
Barnard b
- Equilibrium temperature was calculated assuming a Bond albedo of 0.3. (Gonzalez Hernandez et al. 2024)
- RA
- 17h57m47.67s
- Dec
- +04d44m16.73s
- Distance
- 1.826550±0.000975 pc
- Parallax
- 547.451000±0.289901 mas
- Ecliptic Latitude
- 28.17607 deg
- Ecliptic Longitude
- 269.37276 deg
- Galactic Latitude
- 14.08585 deg
- Galactic Longitude
- 31.04815 deg
- Total Proper Motion
- 10393.550832±0.361912 mas/yr
- Proper Motion (RA)
- -802.803000±0.637868 mas/yr
- Proper Motion (Dec)
- 10362.500000±0.359617 mas/yr
- Photometry
-
mV9.54±0.10
-
mTESS6.882690±0.007429
-
mJ5.244±0.020
-
mH4.834±0.034
-
mKs4.524±0.020
-
mIc6.777
-
mGaia8.195110±0.001998
-
mB11.169±0.061
-
mg10.213700±0.000204
-
mi11.108700±0.002675
-
mr11.2782000±0.0018034
-
mu14.2471000±0.0048158
-
mz7.1575700±0.0002994
-
Abundances
(Hypatia Catalog) -
[Fe/H] -0.53±0.26 dex
-
[C/H] -0.52±0.09 dex
-
[O/H] -0.42±0.04 dex
-
[Na/H] -0.66±0.09 dex
-
[Mg/H] -0.46±0.28 dex
-
[Al/H] -0.44±0.04 dex
-
[Si/H] -0.68±0.17 dex
-
[Ca/H] -0.57±0.04 dex
-
[Y/H] -0.29±0.08 dex
| Source | Gonzalez Hernandez et al. 2024 | TICv8 | Turnbull 2015 | Wright et al. 2004 | Nidever et al. 2002 | Hawley et al. 1996 | Duncan et al. 1991 |
|---|---|---|---|---|---|---|---|
|
S Index
|
--- | --- | --- | 0.761±0.099 | --- | --- | 0.7721 |
|
Teff
(K)
|
3195±28 | 3259.0±157.0 | 3271 | --- | --- | --- | --- |
|
M✶
(M⦿)
|
0.162±0.007 | 0.1626510±0.0200547 | 0.24 | --- | --- | --- | --- |
|
R✶
(R⦿)
|
0.185±0.006 | 0.1935250±0.0057961 | 0.19 | --- | --- | --- | --- |
|
Sp. T
|
M3.5-4 V | --- | M3.5V | --- | --- | M4 | --- |
|
γ
(km/s)
|
--- | --- | --- | --- | -110.5 | --- | --- |
|
L✶
(log10(L⦿))
|
-2.450+0.009-0.009
|
-2.4195+0.0983-0.1273
|
--- | --- | --- | --- | --- |
|
ρ✶
(g/cm3)
|
--- | 31.6382±1.0708 | --- | --- | --- | --- | --- |
|
log g
(log10(cm/s2))
|
4.90±0.09 | 5.0758500±0.0277996 | --- | --- | --- | --- | --- |
|
Metallicity
(dex)
|
-0.56±0.07 [Fe/H] | --- | --- | --- | --- | --- | --- |
|
CAII LOG RHK
|
-5.8±0.1 | --- | --- | --- | --- | --- | --- |
|
Prot
(days)
|
142±9 | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Basant et al. 2025 |
|---|---|
|
Tp
(days)
|
2460243.70+0.08-0.07
(BJD)
|
|
Teq
(K)
|
483 |
|
ω
(deg)
|
-51.80+190.80-93.50
|
|
Mp sin i
(M⨁)
|
0.263±0.024 |
|
Mp sin i
(MJup)
|
0.000827±0.000076 |
|
e
|
0.04+0.05-0.03
|
|
P
(days)
|
2.3402±0.0003 |
|
K
(m/s)
|
0.428±0.036 |
|
a
(au)
|
0.0188±0.0003 |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Basant et al. 2025 | Gonzalez Hernandez et al. 2024 |
|---|---|---|
|
Teq
(K)
|
438 | 400±7 |
|
S
(S⨁)
|
--- | 6.76±0.05 |
|
Mp sin i
(M⨁)
|
0.299±0.026 | 0.37±0.05 |
|
Mp sin i
(MJup)
|
0.000941±0.000082 | 0.0012±0.0002 |
|
e
|
0.03+0.03-0.02
|
<0.16 |
|
P
(days)
|
3.1542±0.0004 | 3.1533±0.0006 |
|
K
(m/s)
|
0.440±0.036 | 0.55±0.07 |
|
a
(au)
|
0.0229±0.0003 | 0.02294±0.00033 |
|
TC
(days)
|
--- |
2460139.204±0.149
(BJD)
|
|
Tp
(days)
|
2460243.38±0.09
(BJD)
|
--- |
|
ω
(deg)
|
3.800+117.700-121.400
|
--- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Basant et al. 2025 |
|---|---|
|
Tp
(days)
|
2460242.92±0.10
(BJD)
|
|
Teq
(K)
|
400 |
|
ω
(deg)
|
90.80+38.90-48.10
|
|
Mp sin i
(M⨁)
|
0.335±0.030 |
|
Mp sin i
(MJup)
|
0.00105±0.00009 |
|
e
|
0.080+0.060-0.050
|
|
P
(days)
|
4.1244±0.0006 |
|
K
(m/s)
|
0.452±0.038 |
|
a
(au)
|
0.0274±0.0004 |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Basant et al. 2025 |
|---|---|
|
Tp
(days)
|
2460245.30+0.37-0.36
(BJD)
|
|
Teq
(K)
|
340 |
|
ω
(deg)
|
-27.50+137.50-96.10
|
|
Mp sin i
(M⨁)
|
0.193±0.033 |
|
Mp sin i
(MJup)
|
0.000607±0.000104 |
|
e
|
0.04+0.03-0.04
|
|
P
(days)
|
6.7392±0.0030 |
|
K
(m/s)
|
0.221±0.037 |
|
a
(au)
|
0.0381±0.0005 |
Literature Time Series
(1 File Type, 1 File)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 82 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
- Known Objects
- 4 Confirmed Planets
- 1 2MASS Point Source Catalog
- Data Files
- 4 KELT Time Series
- 4 Associated Literature Data
-
Four Sub-Earth Planets Orbiting Barnard's Star from MAROON-X and ESPRESSO
Basant et al. 2025 | Reference Overview -
A sub-Earth-mass planet orbiting Barnard's star
Gonzalez Hernandez et al. 2024 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions
Turnbull 2015 | Reference Overview -
Chromospheric Ca II Emission in Nearby F, G, K, and M Stars
Wright et al. 2004 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview -
Radial Velocities of 889 late-type stars
Nidever et al. 2002 | Reference Overview -
Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog
Bakos et al. 2002 | Reference Overview -
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog | Reference Overview -
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs | Reference Overview -
The Palomar/MSU nearby star spectroscopic survey. II. The southern M dwarfs and investigations of magnetic activity.
Hawley et al. 1996 | Reference Overview -
CA II H and K measurements made at Mount Wilson Observatory, 1966-1983
Duncan et al. 1991 | Reference Overview -
UBV(RI)_c photometry of faint nearby stars
Laing 1989 | Reference Overview -
VRI photometry of nearby stars.
Cousins 1980a | Reference Overview
- System
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- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
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