GJ 229 Overview
GJ 229
0.46
R⦿
3912.54
K
GJ 229 A c
GJ 229 b
GJ 229 Ba
860.00
K
GJ 229 Bb
770.00
K
- Other Data
- Bibliography 27
- Exoplanet Archive Notes 6
- GJ 229 Nearby Data 5
- GJ 229 Ba Nearby Data 5
- GJ 229 Bb Nearby Data 5
Discovery Data
| Host | Planet | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|
| GJ 229 | GJ 229 A c | Radial Velocity | 2020 | Feng et al. 2020 | Confirmed Planet |
| GJ 229 | GJ 229 b | Radial Velocity | 2014 | Tuomi et al. 2014 | Confirmed Planet |
GJ 229
- This reference contains discussion regarding the stellar multiplicity of this system. (Nakajima et al. 1995)
- This reference contains discussion regarding the stellar multiplicity of this system. (Tuomi et al. 2014)
- This reference contains discussion regarding the stellar multiplicity of this system. (Nakajima et al. 2015)
- Some stellar parameter values may be biased due to companion blend (WDS Catalog)
- Labeled as HD 42581 b in ref. (Feng et al. 2022)
- Labeled as HD 42581 c in ref. (Feng et al. 2022)
- RA
- 06h10m34.46s
- Dec
- -21d52m03.80s
- Distance
- 5.756240±0.001525 pc
- Parallax
- 173.6960000±0.0456973 mas
- Ecliptic Latitude
- -45.27501 deg
- Ecliptic Longitude
- 93.48343 deg
- Galactic Latitude
- -18.44091 deg
- Galactic Longitude
- 228.61506 deg
- Total Proper Motion
- 731.8329536±0.1508179 mas/yr
- Proper Motion (RA)
- -135.985000±0.103742 mas/yr
- Proper Motion (Dec)
- -719.088000±0.152232 mas/yr
- Photometry
-
mV8.15±0.10
-
mTESS6.408±0.106
-
mJ5.104±0.037
-
mH4.393±0.254
-
mKs4.166±0.232
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mIc6.135
-
mGaia7.307240±0.000617
-
mB9.591±0.019
-
Abundances
(Hypatia Catalog) -
[Fe/H] 0.35±0.04 dex
-
-
-
-
-
-
-
-
-
| Source | Feng et al. 2022 | Feng et al. 2020 | TICv8 | Gaia DR2 | Turnbull 2015 | Tuomi et al. 2014 | Takeda et al. 2007 | Wright et al. 2004 | Nordstrom et al. 2004 | Nidever et al. 2002 | Hawley et al. 1996 | Michigan Catalog, Vol. 4 | Cannon & Pickering 1918 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
S Index
|
--- | --- | --- | --- | --- | --- | --- | 1.675±0.218 | --- | --- | --- | --- | --- |
|
Teff
(K)
|
--- | --- | --- |
3912.5398+147.0403-132.5398
|
3710 | 3564 | --- | --- | --- | --- | --- | --- | --- |
|
γ
(km/s)
|
--- | --- | --- | 4.0223524299131288±0.1621723896123181 | --- | --- | --- | --- | 3.8±0.2 | 4.7 | --- | --- | --- |
|
L✶
(log10(L⦿))
|
--- | --- | --- | --- |
-1.222 +0.398-0.301
|
-1.6 | --- | --- | --- | --- | --- | --- | --- |
|
M✶
(M⦿)
|
0.509±0.020 | 0.58 | 0.544193±0.041196 | --- | 0.48 | 0.58 | --- | --- | --- | --- | --- | --- | --- |
|
Sp. T
|
--- | --- | --- | --- | M1.5V | M1/M2 V | --- | --- | --- | --- | M0.5 | M1/2 V | K5 |
|
R✶
(R⦿)
|
--- | --- | 0.5488210±0.0429828 | --- | 0.46 | --- |
0.46+0.01-0.02
|
--- | --- | --- | --- | --- | --- |
|
log g
(log10(cm/s2))
|
--- | --- | 4.6949600±0.0352265 | --- | 4.81 | --- | 4.81 | --- | --- | --- | --- | --- | --- |
|
v sin i
(km/s)
|
--- | --- | --- | --- | --- | --- | --- | --- | 1 | --- | --- | --- | --- |
|
Age
(Gyr)
|
--- | --- | --- | --- | --- | --- | <0.40 | --- | --- | --- | --- | --- | --- |
|
ρ✶
(g/cm3)
|
--- | --- | 4.6411623±0.7485783 | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source | Feng et al. 2022 | Feng et al. 2020 |
|---|---|---|
|
ω
(deg)
|
128.617+9.165-9.407
|
121±33 |
|
Mp sin i
(M⨁)
|
8.6±0.6 | 7.268±1.256 |
|
Mp sin i
(MJup)
|
0.027±0.002 | 0.02287±0.00395 |
|
e
|
0.366+0.065-0.063
|
0.19±0.08 |
|
P
(days)
|
121.93268+0.06708-0.08158
|
121.995±0.161 |
|
K
(m/s)
|
1.872+0.125-0.133
|
1.93±0.30 |
|
a
(au)
|
0.384±0.005 | 0.339±0.011 |
|
Tp
(days)
|
2450370.180+2.817-2.530
|
--- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source | Feng et al. 2022 | Feng et al. 2020 | Tuomi et al. 2014 |
|---|---|---|---|
|
ω
(deg)
|
246.871+9.041-7.956
|
199±71 | 150 |
|
Mp sin i
(M⨁)
|
15+1-1
|
8.4780±2.0330 |
32+17-16
|
|
Mp sin i
(MJup)
|
0.047+0.003-0.004
|
0.026675±0.006397 |
0.10+0.05-0.05
|
|
e
|
0.4040+0.1050-0.1240
|
0.10±0.06 |
0.10+0.22-0.10
|
|
P
(days)
|
579.47495+1.67942-1.41414
|
526.115±4.300 |
471+22-12
|
|
K
(m/s)
|
1.966+0.161-0.167
|
1.37±0.31 |
3.83+1.74-1.68
|
|
a
(au)
|
1.086±0.015 | 0.898±0.031 |
0.970+0.120-0.090
|
|
Tp
(days)
|
2449954.330+17.738-15.580
|
--- | --- |
- RA
- ---
- Dec
- ---
- Distance
- ---
- Parallax
- ---
- Ecliptic Latitude
- ---
- Ecliptic Longitude
- ---
- Galactic Latitude
- ---
- Galactic Longitude
- ---
- Total Proper Motion
- ---
- Proper Motion (RA)
- ---
- Proper Motion (Dec)
- ---
- Photometry
-
mV---
-
mTESS---
-
mJ---
-
mH---
-
mKs---
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mIc---
-
mGaia---
-
mB---
- Tools
- Stellar Hosts
| Source | Xuan et al. 2024 |
|---|---|
|
Teff
(K)
|
860±20 |
|
L✶
(log10(L⦿))
|
-5.41±0.04 |
|
Age
(Gyr)
|
2.45±0.20 |
|
M✶
(M⦿)
|
0.03640±0.00095 |
|
log g
(log10(cm/s2))
|
5.11±0.01 |
- RA
- ---
- Dec
- ---
- Distance
- ---
- Parallax
- ---
- Ecliptic Latitude
- ---
- Ecliptic Longitude
- ---
- Galactic Latitude
- ---
- Galactic Longitude
- ---
- Total Proper Motion
- ---
- Proper Motion (RA)
- ---
- Proper Motion (Dec)
- ---
- Photometry
-
mV---
-
mTESS---
-
mJ---
-
mH---
-
mKs---
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mIc---
-
mGaia---
-
mB---
- Tools
- Stellar Hosts
| Source | Xuan et al. 2024 |
|---|---|
|
Teff
(K)
|
770±20 |
|
L✶
(log10(L⦿))
|
-5.58±0.04 |
|
Age
(Gyr)
|
2.45±0.20 |
|
M✶
(M⦿)
|
0.0328±0.0014 |
|
log g
(log10(cm/s2))
|
5.03±0.01 |
Literature Stellar Spectra
(3 Files)
| File Type | Spectrum Type | Wavelength Category | Reference |
|---|---|---|---|
| Spectra | echelle grating | Optical | California Planet Search |
| Spectra | echelle grating | Optical | California Planet Search |
| Spectra | echelle grating | Optical | California Planet Search |
Literature Time Series
(1 File Type, 1 File)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 192 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
- Known Objects
- 2 Confirmed Planets
- 3 2MASS Point Source Catalog
- Data Files
- 1 SuperWASP Time Series
- 2 Associated Literature Data
- Known Objects
- 2 Confirmed Planets
- 3 2MASS Point Source Catalog
- Data Files
- 1 SuperWASP Time Series
- 2 Associated Literature Data
- Known Objects
- 2 Confirmed Planets
- 3 2MASS Point Source Catalog
- Data Files
- 1 SuperWASP Time Series
- 2 Associated Literature Data
-
The cool brown dwarf Gliese 229 B is a close binary
Xuan et al. 2024 | Reference Overview -
3D Selection of 167 Substellar Companions to Nearby Stars
Feng et al. 2022 | Reference Overview -
Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs
Feng et al. 2020 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions
Turnbull 2015 | Reference Overview -
Physical Properties of Gliese 229B Based on Newly Determined Carbon and Oxygen Abundances of Gliese 229A
Nakajima et al. 2015 | Reference Overview -
Bayesian search for low-mass planets around nearby M dwarfs - estimates for occurrence rate based on global detectability statistics
Tuomi et al. 2014 | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
CPS
California Planet Search -
Validation of the new Hipparcos reduction
van Leeuwen et al. 2007 | Reference Overview -
Further observations of Hipparcos red stars and standards for UBV(RI)_C photometry
Kilkenny et al. 2007 | Reference Overview -
Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
Takeda et al. 2007 | Reference Overview -
Chromospheric Ca II Emission in Nearby F, G, K, and M Stars
Wright et al. 2004 | Reference Overview -
The Geneva-Copenhagen survey of the Solar neighbourhood. Ages,metallicities and kinematix properties of ~14 000 F and G dwarfs
Nordstrom 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 -
Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
van Altena et al. 2001 | Reference Overview -
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog | Reference Overview -
The Washington Double Star Catalog (WDS, 1996.0)
WDS 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 -
Discovery of a cool brown dwarf
Nakajima et al. 1995 | Reference Overview -
Michigan Catalog of two-dimensional spectral types for the HD stars, Vol 4
Michigan Catalog, Vol. 4 | Reference Overview -
VRI photometry of nearby stars.
Cousins 1980a | Reference Overview -
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 | Reference Overview
- System
- Star
- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
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