alf Cen Overview

Proxima Cen 0.14 R⦿ 3295.50 K
Proxima Cen b
alf Cen B 0.86 R⦿ 5214.00 K
alf Cen A 1.25 R⦿ 5801.00 K
Discovery Data
Host Planet Method Year Reference Disposition
Proxima Cen Proxima Cen b Radial Velocity 2016 Anglada-Escudé et al. 2016 Confirmed Planet
Proxima Cen
  • Some stellar parameter values may be biased due to companion blend (WDS Catalog)
alf Cen B
  • Some stellar parameter values may be biased due to companion blend (WDS Catalog)
alf Cen A
  • Some stellar parameter values may be biased due to companion blend (WDS Catalog)
RA
14h29m34.43s
Dec
-62d40m34.26s
Distance
1.30119+0.00034-0.00035
pc
Parallax
768.500000±0.203021 mas
Ecliptic Latitude
-44.7676 deg
Ecliptic Longitude
239.09202 deg
Galactic Latitude
-1.91805 deg
Galactic Longitude
313.92595 deg
Total Proper Motion
3858.8657674±0.0915852 mas/yr
Proper Motion (RA)
-3781.3100000±0.0851812 mas/yr
Proper Motion (Dec)
769.766000±0.188955 mas/yr
Photometry
mV
11.01±0.10
mTESS
7.360±0.036
mJ
5.357±0.023
mH
4.835±0.057
mKs
4.384±0.033
mW1
---
mW2
---
mW3
---
mW4
---
mIc
7.442
mGaia
8.953610±0.000918
mB
12.782±0.260
Source TICv8 Jenkins et al. 2019 Gaia DR2 Anglada-Escudé et al. 2016 Turnbull 2015 Hawley et al. 1996
Teff
(K)
--- ---
3295.5000+42.8333-4.8333
3050±100 --- ---
Sp. T
--- --- --- M5.5 V M5.0V M5.5
M
(M⦿)
0.1256330±0.0200699 --- --- 0.120±0.015 0.16 ---
L
(log10(L⦿))
--- --- ---
-2.81+0.02-0.02
--- ---
R
(R⦿)
0.1537190±0.0048239 0.154 --- 0.141±0.021 --- ---
Prot
(days)
--- --- --- 83 --- ---
ρ
(g/cm3)
48.7626491±3.2302081 --- --- --- --- ---
log g
(log10(cm/s2))
5.1637200±0.0427119 --- --- --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Source Anglada-Escudé et al. 2016 Jenkins et al. 2019
ω
(deg)
310
252+48-199
e
<0.35
0.080+0.070-0.060
P
(days)
11.186+0.001-0.002
11.1855+0.0016-0.0014
K
(m/s)
1.38±0.21
1.32+0.12-0.14
Teq
(K)
234+6-14
---
S
(S)
0.65 ---
Mp sin i
(M)
1.27+0.19-0.17
---
Mp sin i
(MJup)
0.00400+0.00060-0.00053
---
a
(au)
0.0485+0.0041-0.0051
---
RA
14h39m39.39s
Dec
-60d50m22.10s
Distance
1.35±0.00 pc
Parallax
742.12±1.40 mas
Ecliptic Latitude
-42.59689 deg
Ecliptic Longitude
239.48967 deg
Galactic Latitude
-0.68705 deg
Galactic Longitude
315.73733 deg
Total Proper Motion
3724.12±25.73 mas/yr
Proper Motion (RA)
-3600.35±26.10 mas/yr
Proper Motion (Dec)
952.11±19.75 mas/yr
Photometry
mV
1.340
mTESS
-0.150±1.500
mJ
---
mH
---
mKs
-2.008±0.260
mW1
>0.443
mW2
>0.095
mW3
-1.484±0.392
mW4
-1.794±0.002
mIc
0.462
mGaia
---
mB
2.180
Source Turnbull 2015 Maldonado et al. 2015 Santos et al. 2013 Dumusque et al. 2012 Takeda et al. 2007 Gray et al. 2006 Valenti & Fischer 2005 Pizzolato et al. 2003 Garrison & Beattie 1998 Henry et al. 1996 Cannon & Pickering 1918
S Index
--- --- --- --- --- --- --- --- --- 0.198±0.043 ---
Teff
(K)
5178 5251±23 5234±63 5214±33 --- --- --- --- --- --- ---
M
(M⦿)
0.88 --- 0.87±0.07 0.934±0.006
0.877+0.028-0.013
--- --- --- --- --- ---
R
(R⦿)
0.88 --- --- 0.863 0.88±0.02 --- --- --- --- --- ---
Sp. T
K0V --- --- K1 V --- K2 IV C2+1 ** --- --- K1 V --- K5
L
(log10(L⦿))
-0.284 +0.040-0.044
--- --- --- --- --- --- --- --- --- ---
Metallicity
(dex)
0.23 [Fe/H] 0.26±0.03 [Fe/H] 0.16±0.04 [Fe/H] --- --- --- --- --- --- --- ---
Age
(Gyr)
8 --- --- --- >11.36 --- --- --- --- --- ---
log g
(log10(cm/s2))
4.52 4.56±0.05 4.40±0.11 --- 4.52±0.02 --- --- --- --- --- ---
γ
(km/s)
--- --- --- --- --- --- -18.6 --- --- --- ---
v sin i
(km/s)
--- --- --- --- --- --- 0.9±0.5 --- --- --- ---
Prot
(days)
--- --- --- --- --- --- --- 42.00 --- --- ---
RA
14h39m40.90s
Dec
-60d50m06.53s
Distance
1.34 pc
Parallax
746.27 mas
Ecliptic Latitude
-42.59169 deg
Ecliptic Longitude
239.49102 deg
Galactic Latitude
-0.68433 deg
Galactic Longitude
315.74188 deg
Total Proper Motion
3709.6 mas/yr
Proper Motion (RA)
-3678.2 mas/yr
Proper Motion (Dec)
481.8 mas/yr
Photometry
mV
-0.285
mTESS
-0.01
mJ
---
mH
---
mKs
-2.008±0.260
mW1
---
mW2
---
mW3
---
mW4
---
mIc
-0.683
mGaia
---
mB
0.643
Source Turnbull 2015 Takeda et al. 2007 Gray et al. 2006 Valenti & Fischer 2005 Nordstrom et al. 2004 Pizzolato et al. 2003 Garrison & Beattie 1998 Henry et al. 1996 Henry et al. 1996 Henry et al. 1996 Henry et al. 1996 Henry et al. 1996 Henry et al. 1996 Cannon & Pickering 1918
S Index
--- --- --- --- --- --- --- 0.167 0.160 0.162 0.169 0.157 0.196±0.025 ---
CAII LOG RHK
--- --- --- --- --- --- --- -4.97 -5.01 -5.00 -4.97 -5.03 --- ---
Teff
(K)
5801 --- --- --- --- --- --- --- --- --- --- --- --- ---
L
(log10(L⦿))
0.207 +0.018-0.019
--- --- --- --- --- --- --- --- --- --- --- --- ---
Metallicity
(dex)
0.21 [Fe/H] --- --- --- --- --- --- --- --- --- --- --- --- ---
Age
(Gyr)
7.84
7.84+1.08-1.28
--- --- --- --- --- --- --- --- --- --- --- ---
M
(M⦿)
1.06
1.063+0.048-0.037
--- --- --- --- --- --- --- --- --- --- --- ---
R
(R⦿)
1.25 1.25±0.03 --- --- --- --- --- --- --- --- --- --- --- ---
log g
(log10(cm/s2))
4.3 4.30±0.03 --- --- --- --- --- --- --- --- --- --- --- ---
Sp. T
G2.0V --- G2 V --- --- --- G2 V --- --- --- --- --- --- G0
γ
(km/s)
--- --- --- -21.4 -25.1±0.3 --- --- --- --- --- --- --- --- ---
v sin i
(km/s)
--- --- --- 2.3±0.5 4 --- --- --- --- --- --- --- --- ---
Prot
(days)
--- --- --- --- --- 29.00 --- --- --- --- --- --- --- ---
Literature Time Series (2 File Types, 7 Files)
File Type Data Points Filter Reference
Photometric Light Curve     110 B (Generic) Anglada-Escudé et al. 2016
Photometric Light Curve     1813 H-alpha Anglada-Escudé et al. 2016
Photometric Light Curve     1799 SII Anglada-Escudé et al. 2016
Photometric Light Curve     170 V (Generic) Anglada-Escudé et al. 2016
Photometric Light Curve     180 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Radial Velocity Curve     144 Optical Spectra Anglada-Escudé et al. 2016
Radial Velocity Curve     70 Optical Spectra Anglada-Escudé et al. 2016
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     108 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     111 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Known Objects
1 Confirmed Planets
20 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
Known Objects
1 Confirmed Planets
20 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
Known Objects
1 Confirmed Planets
20 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive
Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2
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