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GJ 338 Overview

GJ 338 A 0.58 R⦿ 4001.00 K
GJ 338 B 0.58 R⦿ 4014.00 K
GJ 338 B b

GJ 338 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
GJ 338 A
GJ 338 B
GJ 338 B b 24.42 d > 10.6 M⨁ Radial Velocity 2020 González-Álvarez et al. 2020 Confirmed Planet
GJ 338 GJ 338 A GJ 338 B
RA
09h14m20.14s
Dec
+52d41m02.97s
Distance
6.33278±0.00148 pc
Parallax
157.8800000±0.0366278 mas
Ecliptic Latitude
34.76155 deg
Ecliptic Longitude
123.59463 deg
Galactic Latitude
42.66141 deg
Galactic Longitude
164.94047 deg
Total Proper Motion
1647.5226105±0.0589804 mas/yr
Proper Motion (RA)
-1546.1000000±0.0588578 mas/yr
Proper Motion (Dec)
-569.1270000±0.0598776 mas/yr
Photometry
mV
7.64±0.10
mTESS
5.941±0.037
mJ
4.889±0.037
mH
3.987±0.188
mKs
3.988±0.036
mGaia
6.968850±0.000478
mB
8.995±0.021
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
Stellar Hosts
Source DiTomasso et al. 2023 TICv8 Turnbull 2015 Takeda et al. 2007 Wright et al. 2004 Nordstrom et al. 2004 Nidever et al. 2002 Duncan et al. 1991 Cannon & Pickering 1918
Teff
(K)
4001±100 --- 3867 --- --- --- --- --- ---
L✶
(log10(L⦿))
-1.10+0.02-0.02
 ---
-1.097 +0.352-0.602
--- --- --- --- --- ---
Metallicity
(dex)
-0.050±0.160 [Fe/H] --- --- --- --- --- --- --- ---
v sin i
(km/s)
2.9±1.2 --- --- --- --- 2 --- --- ---
Age
(Gyr)
4±3 --- --- <0.48 --- --- --- --- ---
M✶
(M⦿)
0.69±0.07 0.5725210±0.0239446 0.58
0.576+0.012-0.016
 --- --- --- --- ---
R✶
(R⦿)
0.58±0.02 0.5812580±0.0229022 0.54 0.54±0.02 --- --- --- --- ---
log g
(log10(cm/s2))
4.68±0.07 4.6671200±0.0160669 4.74 4.74±0.02 --- --- --- --- ---
Sp. T
M0 V --- M0.0V --- --- --- --- --- K2
Prot
(days)
16.3+3.5-1.3
 --- --- --- --- --- --- --- ---
S Index
--- --- --- --- 1.785±0.232 --- --- 2.1126 ---
γ
(km/s)
--- --- --- --- --- 10.5±0.1 11.1 --- ---
ρ✶
(g/cm3)
--- 4.1100807±0.3148438 --- --- --- --- --- --- ---
Print
RA
09h14m22.00s
Dec
+52d41m00.68s
Distance
6.33256+0.00167-0.00168
pc
Parallax
157.8850000±0.0414295 mas
Ecliptic Latitude
34.76266 deg
Ecliptic Longitude
123.60024 deg
Galactic Latitude
42.66615 deg
Galactic Longitude
164.94013 deg
Total Proper Motion
1706.0088713±0.0607681 mas/yr
Proper Motion (RA)
-1573.1200000±0.0613109 mas/yr
Proper Motion (Dec)
-660.1210000±0.0575884 mas/yr
Photometry
mV
7.7±0.1
mTESS
6.046±0.032
mJ
4.779±0.174
mH
4.043±0.206
mKs
4.136±0.020
mGaia
7.04775±0.00044
mB
9.117±0.022
Abundances
(Hypatia Catalog)
[Fe/H] 0.10±0.13 dex
[C/H] -0.08±0.02 dex
[O/H] -0.17±0.02 dex
[Mg/H] 0.10±0.08 dex
[Al/H] -0.16±0.06 dex
[Si/H] 0.05±0.05 dex
[Ca/H] -0.03±0.06 dex
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
Stellar Hosts
Source DiTomasso et al. 2023 González-Álvarez et al. 2020 TICv8 Gaia DR2 Turnbull 2015 Takeda et al. 2007 Wright et al. 2004 Nordstrom et al. 2004 Pizzolato et al. 2003 Nidever et al. 2002 Duncan et al. 1991 Cannon & Pickering 1918
Teff
(K)
4014±100 4005±51 ---
3995.0151+118.5149-102.1201
 3841 --- --- --- --- --- --- ---
L✶
(log10(L⦿))
-1.10+0.02-0.02
-1.10+0.02-0.02
 ---
-1.120797+0.000241-0.000241
-1.097 +0.352-0.602
--- --- --- --- --- --- ---
Metallicity
(dex)
-0.030±0.160 [Fe/H] -0.030±0.160 [Fe/H] --- --- --- --- --- --- --- --- --- ---
v sin i
(km/s)
2.3±1.5 2.3±1.5 --- --- --- --- --- 3 --- --- --- ---
Age
(Gyr)
4±3 4±3 --- --- --- <0.40 --- --- --- --- --- ---
M✶
(M⦿)
0.64±0.07 0.64±0.07 0.5762050±0.0202405 --- 0.55
0.554+0.018-0.002
 --- --- --- --- --- ---
R✶
(R⦿)
0.58±0.03 0.58±0.03 0.5856320±0.0173265
0.5744036+0.0305313-0.0326215
 0.53 0.53±0.02 --- --- --- --- --- ---
log g
(log10(cm/s2))
4.68±0.07 4.68±0.07 4.6633900±0.0104437 --- 4.76
4.76+0.01-0.02
 --- --- --- --- --- ---
Sp. T
M0 V M0.0 V --- --- K7.0V --- --- --- --- --- --- K2
Prot
(days)
16.61±0.04 16.61±0.04 --- --- --- --- --- --- <10.17 --- --- ---
S Index
--- --- --- --- --- --- 1.879±0.244 --- --- --- 1.9546 ---
γ
(km/s)
--- 11.798±0.001 --- 11.979391137538494±0.177366467144935 --- --- --- 11.9±0.1 --- 12.5 --- ---
ρ✶
(g/cm3)
--- --- 4.0445379±0.2172119 --- --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Planetary Systems
Source DiTomasso et al. 2023 González-Álvarez et al. 2020
Mp sin i
(M⨁)
10.6±1.2
10.27+1.47-1.38
Mp sin i
(MJup)
0.0334±0.0038
0.03231+0.00463-0.00434
e
0.109+0.100-0.075
0.11+0.11-0.08
P
(days)
24.422±0.014 24.45±0.02
K
(m/s)
3.19±0.27 3.07±0.37
a
(au)
0.142±0.005 0.141±0.005
TC
(days)
2457521.43+0.72-0.90
(JD)
---
Tp
(days)
---
2457517.06+6.15-4.72
(BJD)
Teq
(K)
--- 391±20
ω
(deg)
---
204.3+94.4-70.0
Print
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     85 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     85 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Known Objects
1 Confirmed Planets
2 2MASS Point Source Catalog
Data Files
2 SuperWASP Time Series
1 Associated Literature Data
Known Objects
1 Confirmed Planets
2 2MASS Point Source Catalog
Data Files
2 SuperWASP Time Series
1 Associated Literature Data
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