Coord 2000 | 14396-6050 | Discov num | RHD 1 | Comp | AB | Coord arcsec 2000 | 14 39 36.50 -60 50 02.3 | ||||
Date first | 1752 | Date last | 2019 | Obs | 480 | ||||||
Pa first | 218 | Pa last | 343.7 | P.A. Now (θ) | 1.8° | ||||||
Sep first | 20.5 | Sep last | 5.279 | Sep. Now (ρ) | 7.451" | ||||||
Mag pri | -0.01 | Mag sec | 1.33 | delta mag (ΔM) | 1.34 | Spectral class | G2V+K1V (yellow/yellow-orange) | ||||
Pri motion ra | -368 | Sec motion ra | |||||||||
Pri motion dec | +047 | Sec motion dec | |||||||||
Notes | N O P (See Notes, Orbital solution, 100-year proper motion) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Rigil Kentaurus | 252838 | 14 39 36 -60 50 02 | RHD 1 AB | 2019 | 480 | 344 | 5.3 | -0.01 | 1.33 | 1.34 | Y | <=== |
Show | 252838 | 14 39 36 -60 50 02 | LDS 494 AC | 2016 | 4 | 212 | 999.9 | 0.14 | 12.70 | 12.56 | Y | ||
Show | 14 29 43 -62 40 46 | SCZ 1 Ca,Cb | 1996 | 2 | 100 | 0.3 | 11.10 | 18.00 | 6.90 |
Common name | Rigil Kentaurus | Constellation | Centaurus | SAO | 252838 | HIP | 71683 | ||||
Tycho2 | 9007-05849-1 | Gaia DR2 | 5877748648286736896 | HD | 128620 | HR | 5459 | ||||
GC | 19728 | GL | Gl 559A | CP | CP-60 5483 | Bayer | Alpha Centauri | ||||
Bayer name | Alp Cen | FK5 | 538 | Distance | 1.32 | Distance ly | 4.31 | ||||
Bayer greek | α Cen |
Other names | Rigil Kent, Rigel Kentaurus, Toliman |
Meaning | foot of the centaur |
Period (P) | 79.91y | ± 0.013 | Periastron (T) | 1955.66y | ± 0.014 | Semi-major axis (a) | 17.66a | ± 0.026 |
Eccentricity (e) | 0.524 | ± 0.0011 | Inclination (i) | 79.32° | ± 0.044 | Longitude of periastron (ω) | 232.3° | ± 0.11 |
Node (Ω) | 204.75° | ± 0.087 | Notes | n | Reference | Pbx2016 | ||
Equinox | 2000 | Last observation | 2014 | Grade | 2 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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discov_num | notes | refcode |
RHD 1 | alp Cen = LDS 494 = Rigel Kentaurus. C is Proxima Centauri = V645 Cen. | |
According to R.G. Aitken, this was discovered by | A__1935f | |
Father Richaud while observing a comet at Pondicherry, India, in | Rhd1729 | |
December 1689. P= 79.9y, a = 17.52", motion direct. Due to the | ||
proximity of the pair and the eccentricity of the system, the | ||
separation ranges from 2 to 22". AB is also known as Rigil Kentaurus. | ||
Henroteau notes that a first attempt to measure the relative positions | HFC1928 | |
of binary components was made by Father Louis Feuillee in 1709, when | Feu1714 | |
he estimated the position angle and distance for alp Cen. | ||
Proper motion -3642 +699. The distant companion, Proxima Centauri, | ||
distance 9000" was discovered by Innes. It is the flare star V645 Cen, | I__1905 | |
(mag. 10.7, 2.2 degrees distant, M5Ve). See Kamper & Wesselink (1978). | Kpr1978 | |
The secular changes of a, i, node, and longitude of periastron have | ||
been allowed for; quoted elements are for 2000.0. | ||
The semi-major axis has been revised (Heintz 1982). | Hei1982a | |
Difficult for Hipparcos with secondary (= HIP 71681) at edge of | Sod1999 | |
the sensitivity profile. Present parallax preferable to HIP value. | ||
Mass-ratio from Kamper & Wesselink. | ||
Pourbaix gives two combined solutions for this resolved SB2, each | Pbx2000b | |
yielding orbital parallaxes and component masses. | Pbx2002 | |
AB: Additional notes may be found in van den Bos (1931). | B__1931b | |
AB: Malkov et al. (2012) derive dynamical, photometric, and | ||
spectroscopic masses 1.98 +/- 0.03, 2.04, and 1.79 Msun, respectively. | Mlk2012 | |
Powell also measured a more distant component (CPD-60 5485) which is | Pwl1864 | |
obviously non-physical (1860.312, 353.7 deg, 161.5"). | ||
VLTI Uniform disk diameter of A,B: | LTI2003b | |
= 8.314 +/- 0.016, 5.856 +/- 0.027 mas, | ||
VLTI Limb-darkened diameter of A,B: | ||
= 8.511 +/- 0.020, 6.001 +/- 0.034 mas, | ||
R = 1.224 +/- 0.003, 0.863 +/- 0.005 \rsun. | ||
VLTI Limb-darkened diameter of Proxima (C) 1.044 +/- 0.08 mas, | LTI2003a | |
M = 0.123 +/- 0.006 \msun, R = 0.145 +/- 0.011 \rsun, | ||
T = 3042 +/- 117 K. | ||
VLTI uniform disk diameter of C: 0.990 +/- 0.050 mas, | LTI2009 | |
VLTI limb-darkened disk diameter of C: 1.011 +/- 0.052 mas, | ||
R = 0.141 +/- 0.007 \rsun, Teff = 3098 +/- 56 K, | ||
M = 0.123 +/- 0.006 \msun. | ||
Teff-A = 5829 +/- 6, Teff-B = 5189 +/- 18 K. | XXX2018a | |
Based on astroseismology, age is 5.9 to 7.3 Gyr. | XXX2021a | |
Ma = 1.0788 +/- 0.0029 \msun, Mb = 0.9092 +/- 0.0025 \msun; | ||
Ra = 1.2175 +/- 0.0055 \rsun, Rb = 0.8591 +/- 0.0036 \rsun. | Ake2021 | |
LDS 494 | AC: alp Cen + Proxima Cen | |
The Kervella et al. (2017) orbit is based on the following adopted | ||
physical parameters: | ||
alp Cen A: M = 1.1055 +/- 0.0039 Msun R = 1.2234 +/- 0.0053 Rsun | ||
alp Cen B: 0.9373 0.0033 0.8632 0.0037 | ||
Proxima : 0.1221 0.0022 0.1542 0.0045 | Kev2017 | |
SCZ 1 | Ca,Cb: Proxima Centauri. Not a binary! | Tok2014d |
Ca: Based on spectroscopic orbit of Proxima Cen b by Anglada-Escude et | ||
al. (2016 Nature 536, 438), Brown (2017) derives an estimate of 0.25 | ||
for the eccentricity of the planetary companion. | BnR2017 | |
alp Cen | Beamin et al. (2017) searched for faint co-moving companions to the | |
alpha Cen system, examining CCD tiles covering a ~19 deg^2 area and | ||
taken at multiple epochs between 2010.2 and 2015.5. No additional | ||
companions were detected down to limiting magnitudes Y=19.3 and J=19. | VVV2017b |
refcode | metd | author | reference |
A__1935f | - | Aitken, R.G. | 1935QB821.A3....... |
A__1935f | The Binary Stars, 1935 | ||
Ake2021 | Ka j | Akeson, R.L., Beichman, C., Kervella, P., Fomalont, E. & Benedict, G.F. | 2021AJ....162...14A |
Ake2021 | +orb | AJ 162, 14, 2021 | |
Ake2021 | +not | ||
B__1931b | Ma - | van den Bos, W.H. | 1931CiUO...85..183V |
B__1931b | Union Obs. Johannesburg Circ. 85, 183, 1931 | ||
Feu1714 | - | Feuillee, Louis | ................... |
Feu1714 | Journal des Observations Physiques, Paris 1, p 425, 1714 | ||
Hei1982a | orb - | Heintz, W.D. | 1982Obs...102...42H |
Hei1982a | Observatory 102, 42, 1982 | ||
HFC1928 | - | Henroteau, F.C. | 1928HDA.....6..299H |
HFC1928 | Handbuch der Astrophysik 6, part 2, 299, 1928 (no data) | ||
I__1905 | Ma - | Innes, R.T.A. | 1905AnCap...2....4I |
I__1905 | Ann. Cape Obs. 2, Pt.4, 1905 | ||
Kpr1978 | - | Kamper & Wesselink | 1978AJ.....83.1653K |
Kpr1978 | AJ 83, 1653, 1978 | ||
LTI2003a | not j | Segransan, D., Kervella, P., Forveille, T. & Queloz, D. | 2003A&A...397L...5S |
LTI2003a | A&AL 397, 5, 2003 | . | |
LTI2003b | not j | Kervella, P., Thevenin, F., Segransan, D., Berthomieu, G., Lopez, B., Morel, P. & | 2003A&A...404.1087K |
LTI2003b | Provost, J. | . | |
LTI2003b | A&A 404, 1087, 2003 | . | |
LTI2009 | not j | Demory, B.-O., Segransan, D., Forveille, T., Queloz, D., Beuzit, J.-L., Delfosse, | 2009A&A...505..205D |
LTI2009 | X., Di Folco, E., Kervella, P., Le Bouquin, J.-B., Perrier, C., Benisty, M., | . | |
LTI2009 | Duvert, G., Hofmann, K.-H., Lopez, B. & Petrov, R. | . | |
LTI2009 | A&A 505, 205, 2009 | . | |
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Pbx2000b | orb - | Pourbaix, D. | 2000A&AS..145..215P |
Pbx2000b | A&AS 145, 215, 2000 | ||
Pbx2002 | orb - | Pourbaix, D., Nidever, D., McCarthy, C., Butler, R.P., Tinney, C.G., Marcy, G.W., | 2002A&A...386..280P |
Pbx2002 | Jones, H.R.A., Penny, A.J., et al. | ||
Pbx2002 | A&A 386, 280, 2002 | ||
Pbx2016 | orb - | Pourbaix, D. & Boffin, H.M.J. | 2016A&A...586A..90P |
Pbx2016 | A&A 586, A90, 2016 | ||
Pwl1864 | Ma j | Powell, E.B. | 1864MmRAS..32...75P |
Pwl1864 | MemRAS 32, 75, 1864 | ||
Rhd1729 | - | Richaud, Father | ................... |
Rhd1729 | Paris, Histoire de l'Academie des Sciences avant son renouvellement en 1699, 7, | ||
Rhd1729 | p 206, 1729 | ||
Rhd1729 | West Ranch High School | ||
Sod1999 | orb - | Soderhjelm, S. | 1999A&A...341..121S |
Sod1999 | A&A 341, 121, 1999 | ||
Tok2014d | E2 - | Tokovinin, A. | 2014AJ....147...86T |
Tok2014d | AJ 147, 86, 2014 | ||
VVV2017b | N - | Beamin, J.C., Minniti, D., Pullen, J.B., Ivanov, V.D., Bendek, E., Bayo, A., | 2017MNRAS.472.3952B |
VVV2017b | Gromadzki, M., Kurtev, R., Lucas, P.W., & Butler, R.P. | ||
VVV2017b | MNRAS 472, 3952, 2017 | ||
XXX2018a | not | Morel, T. | 2018A&A...615A.172M |
XXX2018a | A&A 615, 72, 2018 |
idgroup | discov | author |
1 | LDS | Luyten p.m. catalog (from additional DD list) |
1 | SCZ | Schultz, A.B., Hart, H.M., Hershey, J.L., Hamilton, F.C., Kochte, M., |
1 | SCZ | Bruhweiler, F.C., Benedict, G.F., Caldwell, J., Cunningham, C., Wu, Nailong, |
1 | SCZ | Franz, O.G., Keyes, C.D., & Brandt, J.C. |
2 | SCZ | Schultz, A.B. , Hart, H.M., Herschey, J.L., Hamilton, F.C., Kochte, M., |
2 | SCZ | Bruhweiler, F.C., Benedict, G.F., Caldwell, J., et al. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
14396-6050 | RHD 1 | AB | 2007 | 438 | 236 | 8.8 | 0.14 | 1.24 | G2V K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2008 | 442 | 240 | 7.8 | 0.14 | 1.24 | G2V K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2009 | 443 | 244 | 7.0 | 0.14 | 1.24 | G2V K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2012 | 444 | 255 | 5.0 | 0.14 | 1.24 | G2V K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2013 | 446 | 263 | 5.1 | -0.01 | 1.33 | G2V+K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2014 | 447 | 279 | 4.3 | -0.01 | 1.33 | G2V+K1V | NODP | 143940.90-605006.5 |
14396-6050 | RHD 1 | AB | 2016 | 458 | 313 | 4.1 | -0.01 | 1.33 | G2V+K1V | NO P | 143936.50-605002.3 |
14396-6050 | RHD 1 | AB | 2017 | 461 | 324 | 4.2 | -0.01 | 1.33 | G2V+K1V | NO P | 143936.50-605002.3 |
14396-6050 | RHD 1 | AB | 2019 | 463 | 341 | 5.2 | -0.01 | 1.33 | G2V+K1V | NO P | 143936.50-605002.3 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | B | C | |
B | pa=351.9° sep=5.12" | ||
C | pa=213.1° sep=7865.86" | pa=213.1° sep=7869.82" | |
Cb | pa=213.1° sep=7865.83" | pa=213.1° sep=7869.78" | pa=111.0° sep=0.16" |
Common name | Rigil Kentaurus | Meaning | foot of the centaur | Other names | Rigil Kent, Rigel Kentaurus, Toliman | Coord arcsec 2000 | 143936.50-605002.3 | ||||
Mag | -0.01 | Spectral class | G2V (yellow) | PmRA | -368.00 | PmDE | 47.0 | ||||
SAO | 252838 | HIP | 71683 | Tycho2 | 9007-05849-1 | HD | 128620 | ||||
HR | 5459 | GC | 19728 | CP | CP-60 5483 | Bayer | Alpha Centauri | ||||
Bayer name | Alp Cen | FK5 | 538 |
SAO | 252838 | DelFlag | RA1950 | PmRA1950 | -0.4904 | ||||||
DE1950 | PmDE1950 | 0.712 | Vmag | 0.1 | SpType | +++ | |||||
Double code | Source | 74 | CatNum | 538 | DM | CP-60 5483 | |||||
DMcomp | BDsup | HD | 128620 | M HD | 9 | ||||||
GC | 19728 | RA1950rad | 3.82308938 | DE1950rad | -1.0581972 | PmRA2000 | -0.4949 | ||||
PmDE2000 | 0.699 |
Catalog | H | HIP | 71683 | Proxy | RAhms | 14 39 40.90 | |||||
DEdms | -60 50 06.5 | Vmag | -0.01 | VarFlag | R Vmag | G | |||||
RAdeg | 219.92 | DEdeg | -60.8351 | AstroRef | A | Plx | 742.12 | ||||
CCDM | 14396-6050 | N CCDM | I | Nsys | 3 | Ncomp | 1 | ||||
MultFlag | C | Source | P | Qual | D | M HIP | |||||
Theta | Rho | HD | 128620 | BD | |||||||
CD | CP | CP-60 5483 | Dm number | -60 5483 | VIred | 0.69 | |||||
SpType | G2V | R SpType | Coord arcsec 2000 | 143940.90-605006.5 |
HIP | 71683 | Sn | 95 | So | 3 | Nc | 1 | ||||
RArad | 3.8383352142 | DErad | -1.061773585 | Plx | 754.81 | PmRA | -3679.25 | ||||
PmDE | 473.67 | E RArad | 3.07 | E DErad | 2.46 | E Plx | 4.11 | ||||
E pmRA | 3.89 | E pmDE | 3.24 | Hpmag | 0.1373 | E Hpmag | 0.0472 | ||||
SHp | 0.063 | VA | 0 | BV | 0.71 | E BV | 0.04 | ||||
VI | 0.69 |
Ccdm | 14396-6050 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -0.12 | DDEs | -7.4 | ||||||
R dRAs | 6 | Year | Theta | Rho | |||||||
Obs | 3 | Vmag | 0.3 | Sp | G0 | PmNote | * | ||||
PmRA | -3642 | PmDE | 699 | Dm number | -60 5483 | Cat1 | CPD | ||||
Name2 | Cat2 | HD | 128620 | M HD | |||||||
ADS BDS | M ADS BDS | N IDS | IDS | 14328S6025A | |||||||
HIC | 71683 |
Coord arcsec 2000 | 143936.40-604957.2 | Mag | 1.33 | Spectral class | K1V (yellow-orange) | SAO | 71681 | ||||
HIP | 71681 | Tycho2 | 9007-05848-1 | HD | 128621 | HR | 5460 | ||||
DM | BD+38 4601 | Bayer | Alpha 2 Centauri | Bayer name | Alp2 Cen | Calc delta mag | 1.34 | ||||
Calc coord | yes |
SAO | 71681 | DelFlag | RA1950 | PmRA1950 | -0.0027 | ||||||
DE1950 | PmDE1950 | 0.006 | Vmag | 8.9 | SpType | ||||||
Double code | Source | 5 | CatNum | 2316 | DM | BD+38 4601 | |||||
DMcomp | BDsup | HD | M HD | ||||||||
GC | RA1950rad | 5.69050677 | DE1950rad | 0.68605408 | PmRA2000 | -0.0025 | |||||
PmDE2000 | 0.002 |
Catalog | H | HIP | 71681 | Proxy | RAhms | 14 39 39.39 | |||||
DEdms | -60 50 22.1 | Vmag | 1.35 | VarFlag | R Vmag | G | |||||
RAdeg | 219.914 | DEdeg | -60.8395 | AstroRef | B | Plx | 742.12 | ||||
CCDM | 14396-6050 | N CCDM | I | Nsys | 3 | Ncomp | 1 | ||||
MultFlag | C | Source | L | Qual | D | M HIP | |||||
Theta | Rho | HD | 128621 | BD | |||||||
CD | CP | Dm number | VIred | 0.88 | |||||||
SpType | K1V | R SpType | Coord arcsec 2000 | 143939.39-605022.1 |
HIP | 71681 | Sn | 95 | So | 3 | Nc | 1 | ||||
RArad | 3.8382255459 | DErad | -1.0618492493 | Plx | 796.92 | PmRA | -3614.39 | ||||
PmDE | 802.98 | E RArad | 19.15 | E DErad | 14.24 | E Plx | 25.9 | ||||
E pmRA | 20.48 | E pmDE | 19.52 | Hpmag | 1.2429 | E Hpmag | 0.1154 | ||||
SHp | 0 | VA | 0 | BV | 0.9 | E BV | 0.02 | ||||
VI | 0.88 |
Ccdm | 14396-6050 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | DRAs | -0.12 | DDEs | -7.4 | ||||||
R dRAs | 6 | Year | 1752 | Theta | Rho | ||||||
Obs | 99 | Vmag | 1.7 | Sp | K5 | PmNote | * | ||||
PmRA | -3642 | PmDE | 699 | Dm number | Cat1 | ||||||
Name2 | Cat2 | HD | 128621 | M HD | |||||||
ADS BDS | M ADS BDS | N | N IDS | IDS | 14328S6025B | ||||||
HIC | 71681 |
Var name | V645 Cen | Coord arcsec 2000 | 142942.94-624046.1 | Coord calc | 143455.28-624232.9 | Mag | 11.1 | ||||
Mag composta | 12.7 | Spectral class | M5Ve (red) | PmRA | -368.00 | PmDE | 48.0 | ||||
HIP | 70890 | HD | 999999 | Bayer | Alpha 3 Centauri | Bayer name | Alp3 Cen | ||||
Calc delta mag | 11.11 |
Catalog | H | HIP | 70890 | Proxy | RAhms | 14 29 47.75 | |||||
DEdms | -62 40 52.9 | Vmag | 11.01 | VarFlag | 2 | R Vmag | G | ||||
RAdeg | 217.449 | DEdeg | -62.6814 | AstroRef | Plx | 772.33 | |||||
CCDM | 14396-6050 | N CCDM | I | Nsys | 3 | Ncomp | 1 | ||||
MultFlag | Source | Qual | M HIP | ||||||||
Theta | Rho | HD | BD | ||||||||
CD | CP | Dm number | VIred | 3.62 | |||||||
SpType | M5Ve | R SpType | Coord arcsec 2000 | 142947.75-624052.9 |
HIP | 70890 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 3.7952000878 | DErad | -1.0939959696 | Plx | 771.64 | PmRA | -3775.75 | ||||
PmDE | 765.54 | E RArad | 1.39 | E DErad | 1.57 | E Plx | 2.6 | ||||
E pmRA | 1.63 | E pmDE | 2.01 | Hpmag | 10.7613 | E Hpmag | 0.0038 | ||||
SHp | 0.047 | VA | 0 | BV | 1.807 | E BV | 0.02 | ||||
VI | 3.62 |
Coord arcsec 2000 | 142942.96-624046.2 | Mag | 18 | Calc delta mag | 18.01 | Calc coord | yes |