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Doubles in session


Current system
11210-5429
I 879
Pi Cen


Nearby doubles
8' : 11209-5437
KPP1823

15' : 11226-5423
RST1580

25' : 11185-5441
BRT2064

34' : 11185-5455
BRT2065

35' : 11225-5501
DAW 202AB

40' : 11236-5503
LDS 352

41' : 11210-5349
TDS7812

41' : 11207-5349
TDS7803

41' : 11163-5427
RST5523AB

47' : 11260-5415
TDS7857

47' : 11262-5434
RST1587

49' : 11155-5422
KPP 831

52' : 11193-5519
TDS7790

53' : 11150-5420
BRT2062

55' : 11149-5420
BRT2061

57' : 11270-5451
HJ 4436

60' : 11152-5359
BRT2063

62' : 11198-5329
SEE 129

63' : 11212-5532
BRT2577

63' : 11206-5532
TDS7799

66' : 11285-5421
CPO 325

69' : 11225-5322
BNS 6AB

71' : 11286-5453
FIN 416

71' : 11225-5320
DAM 548

72' : 11288-5453
FIN 185

72' : 11142-5510
TDS7749



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

11210-5429 I 879 (Pi Cen)

 
 
11h 21m 00.40s -54° 29' 27.7" P.A. 113.00 sep 0.3 mag 4.08,5.65 Sp B5Vn dist. 109.65 pc (357.68 l.y.)
 
 
Coord 2000 11210-5429 Discov num I   879 Comp Coord arcsec 2000 11 21 00.40 -54 29 27.7
Date first 1910 Date last 2019 Obs 59
Pa first 140 Pa last 113.1 P.A. Now (θ) 119.2°
Sep first 0.5 Sep last 0.329 Sep. Now (ρ) 0.378"
Mag pri 4.08 Mag sec 5.65 delta mag (ΔM) 1.57 Spectral class B5Vn (blue-white)
Pri motion ra -040 Sec motion ra -040
Pri motion dec -003 Sec motion dec -003
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Pi Cen Constellation Centaurus SAO 238986 HIP 55425
Tycho2 8621-02002-1 Gaia DR2 5346659311958869248 HD 98718 HR 4390
GC 15601 CP CP-53 4498 Bayer Pi Centauri Bayer name Pi Cen
FK5 428 Distance 109.65 Distance ly 357.68 Bayer greek π Cen
 
 
ORBITAL ELEMENTS
 
 
Period (P)39y± 0.19 Periastron (T)2010.41y± 0.037 Semi-major axis (a)0.2263a± 0.0011
Eccentricity (e)0.853± 0.004 Inclination (i)19.4°± 4.9 Longitude of periastron (ω)340.3°± 4
Node (Ω)327.8°± 3.9 Notesn ReferenceTok2012b
Equinox2000 Last observation2012 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 142.6 0.356
2001 144.5 0.340
2002 146.7 0.323
2003 149.0 0.303
2004 151.8 0.280
2005 155.0 0.254
2006 159.1 0.224
2007 164.5 0.190
2008 172.6 0.150
2009 187.6 0.102
2010 237.8 0.045
2011 33.1 0.056
2012 71.4 0.108
2013 85.5 0.152
2014 93.5 0.190
2015 98.9 0.223
2016 103.1 0.251
2017 106.4 0.277
2018 109.2 0.299
2019 111.6 0.319
2020 113.8 0.337
2021 115.8 0.353
2022 117.6 0.366
2023 119.2 0.378
2024 120.8 0.388
2025 122.3 0.397
2026 123.8 0.404
2027 125.2 0.409
2028 126.6 0.413
2029 127.9 0.416
2030 129.3 0.417


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds11210-5429b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 11210-5429 I 879 (Pi Cen) : NOTES
 
 
discov_num notes refcode
I 879 pi Cen.
The spectral lines are very poor; the RV range of 30km/s is probably
mere scatter. A few more speckle obs needed to constrain eccentricity.
1976.474: This system was observed within a few months of periastron. BLM1978
Hipparcos parallax 9.12 +/- 0.34 mas. Dynamical parallax 9.1 mas,
masses 6.43 and 3.68 Msun. The orbit by Mason et al. (1999) had to be Msn1999a
revised using our measures near the periastron. The high eccentricity
e = 0.853 is now well established. Tok2012b
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 15.29 +/- 3.02, 8.37, and 4.79 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
BLM1978 S j Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C. 1978MNRAS.183..701M
BLM1978 MNRAS 183, 701, 1978
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Msn1999a Su j Mason, B.D., Douglass, G.G., & Hartkopf, W.I. 1999AJ....117.1023M
Msn1999a +orb AJ 117, 1023, 1999
Tok2012b S j Tokovinin, A. 2012AJ....144...56T
Tok2012b +orb AJ 144, 56, 2012
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
11210-5429 I 879 2006 51 159 0.2 4.08 5.65 B5Vn NOD 112100.40-542927.7
11210-5429 I 879 2011 52 218 0.1 4.08 5.65 B5Vn NOD 112100.40-542927.7
11210-5429 I 879 2012 53 254 0.1 4.08 5.65 B5Vn NOD 112100.40-542927.7
11210-5429 I 879 2013 54 266 0.2 4.08 5.65 B5Vn NOD 112100.40-542927.7
11210-5429 I 879 2014 56 94 0.2 4.08 5.65 B5Vn NO 112100.40-542927.7
11210-5429 I 879 2015 57 100 0.2 4.08 5.65 B5Vn NO 112100.40-542927.7
11210-5429 I 879 2018 58 110 0.3 4.08 5.65 B5Vn NO 112100.40-542927.7
11210-5429 I 879 2019 59 113 0.3 4.08 5.65 B5Vn NO 112100.40-542927.7

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 11210-5429 I 879 (Pi Cen) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 11210-5429 I 879 (Pi Cen) : MEASURES
 
 
No records found.

 
 
WDS 11210-5429 (Pi Cen) : VIRTUAL EYEPIECE
 
 

11210-5429 I 879A mag 4.08 Sp B5Vn 11210-5429 I 879B sep 0.2 P.A. 126.30 mag 5.65 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 11210-5429 (Pi Cen) : ALADIN DSS IMAGE @ 11h 21m 00.40s -54° 29' 27.7"
 
 
 
 
WDS 11210-5429 I 879 (Pi Cen) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

11210-5429 I 879 distance=0' 11209-5437 KPP1823 distance=8' 11226-5423 RST1580 distance=15' 11185-5441 BRT2064 distance=25' 11185-5455 BRT2065 distance=34' 11225-5501 DAW 202AB distance=35' 11225-5501 HJ 4431AC distance=35' 11236-5503 LDS 352 distance=40' 11210-5349 TDS7812 distance=41' 11207-5349 TDS7803 distance=41' 11163-5427 RST5523AB distance=41' 11260-5415 TDS7857 distance=47' 11262-5434 RST1587 distance=47' 11155-5422 KPP 831 distance=49' 11193-5519 TDS7790 distance=52' 11150-5420 BRT2062 distance=53' 11149-5420 BRT2061 distance=55' 11270-5451 HJ 4436 distance=57' 11152-5359 BRT2063 distance=60' 11198-5329 SEE 129 distance=62' 11212-5532 BRT2577 distance=63' 11206-5532 TDS7799 distance=63' 11285-5421 CPO 325 distance=66' 11225-5322 BNS 6AB distance=69' 11225-5322 RST1578AC distance=69' 11286-5453 FIN 416 distance=71' 11225-5320 DAM 548 distance=71' 11288-5453 FIN 185 distance=72' 11142-5510 TDS7749 distance=72' 11275-5515 TDS7866 distance=73' 11190-5541 TDS7788 distance=74' 11284-5505 TDS7876 distance=74' 11201-5543 KPP1953 distance=74' 11166-5533 I 875AB distance=75' 11127-5447 BRT2060 distance=75' 11265-5529 HJ 4434 distance=76' 11170-5537 FIN 181 distance=76' 11228-5545 RST1582 distance=78' 11133-5348 TDS 623 distance=80' 11301-5440 HJ 4442 distance=81' 11143-5525 TDS7751 distance=81' 11237-5552 KPP 244 distance=86' 11135-5526 HJ 4417 distance=86' 11248-5552 KPP 246 distance=89' 11123-5346 LDS 339 distance=90' 11188-5558 TDS7785 distance=91' 11311-5457 TDS7904 distance=92' 11189-5559 TDS7787 distance=92' 11299-5519 FIN 43 distance=92' 11229-5257 RST1583 distance=94' 11151-5549 TDS7759 distance=94' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 11210-5429 I 879 113 0.3
Show 11209-5437 KPP1823 231 14.1 8
Show 11226-5423 RST1580 141 0.5 15
Show 11185-5441 BRT2064 74 4.6 25
Show 11185-5455 BRT2065 4.4 34
Show 11225-5501 DAW 202 AB 12 7.5 35
Show 11225-5501 HJ 4431 AC 223 13.1 35
Show 11236-5503 LDS 352 40 7.9 40
Show 11210-5349 TDS7812 6 1.7 41
Show 11207-5349 TDS7803 97 0.6 41
Show 11163-5427 RST5523 AB 70 0.7 41
Show 11260-5415 TDS7857 247 0.5 47
Show 11262-5434 RST1587 195 3.4 47
Show 11155-5422 KPP 831 12 7.1 49
Show 11193-5519 TDS7790 346 1.9 52
Show 11150-5420 BRT2062 5 5.2 53
Show 11149-5420 BRT2061 350 2.0 55
Show 11270-5451 HJ 4436 357 14.2 57
Show 11152-5359 BRT2063 295 3.4 60
Show 11198-5329 SEE 129 6 6.6 62
Show 11212-5532 BRT2577 142 4.2 63
Show 11206-5532 TDS7799 2.3 63
Show 11285-5421 CPO 325 42 7.3 66
Show 11225-5322 BNS 6 AB -1 -1.0 69
Show 11225-5322 RST1578 AC 4.8 69
Show 11286-5453 FIN 416 230 0.5 71
Show 11225-5320 DAM 548 302 8.3 71
Show 11288-5453 FIN 185 189 3.0 72
Show 11142-5510 TDS7749 52 1.1 72
Show 11275-5515 TDS7866 335 0.5 73
Show 11190-5541 TDS7788 18 1.7 74
Show 11284-5505 TDS7876 75 2.4 74
Show 11201-5543 KPP1953 90 15.4 74
Show 11166-5533 I 875 AB 239 2.0 75
Show 11127-5447 BRT2060 219 4.1 75
Show 11265-5529 HJ 4434 257 12.4 76
Show 11170-5537 FIN 181 120 0.4 76
Show 11228-5545 RST1582 356 1.6 78
Show 11133-5348 TDS 623 343 1.2 80
Show 11301-5440 HJ 4442 230 3.4 81
Show 11143-5525 TDS7751 79 0.5 81
Show 11237-5552 KPP 244 63 4.9 86
Show 11135-5526 HJ 4417 147 19.7 86
Show 11248-5552 KPP 246 309 3.5 89
Show 11123-5346 LDS 339 26 6.1 90
Show 11188-5558 TDS7785 204 0.6 91
Show 11311-5457 TDS7904 120 0.7 92
Show 11189-5559 TDS7787 153 1.4 92
Show 11299-5519 FIN 43 286 1.7 92
Show 11229-5257 RST1583 72 2.4 94
Show 11151-5549 TDS7759 119 1.7 94

 
 
WDS 11210-5429 : COMPONENTS
 
 
  A
B pa=126.3°
sep=0.22"
 
 
11210-5429 A
 
 
Componente originario normalizzato AB Name Pi Cen Coord arcsec 2000 112100.40-542927.7 Mag 4.08
Spectral class B5Vn (blue-white) PmRA -40.00 PmDE -3.0 SAO 238986
HIP 55425 Tycho2 8621-02002-1 HD 98718 HR 4390
GC 15601 CP CP-53 4498 Bayer Pi Bayer name Pi
FK5 428
Tycho2
Tycho2 8621-02002-1 Pflag RAmdeg 170.25170677 DEmdeg -54.49103279
PmRA -39.6 PmDE -2.7 E RAmdeg 3 E DEmdeg 3
E pmRA 0.9 E pmDE 0.9 EpRAm 1991.28 EpDEm 1991.53
Num 10 Q RAmdeg 0.7 Q DEmdeg 1.0 Q pmRA 0.8
Q pmDE 1.1 BTmag 3.719 E BTmag 0.014 VTmag 3.873
E VTmag 0.009 Prox 999 TYC T HIP 55425
CCDM AB RAdeg 170.25186694 DEdeg -54.49102639 EpRA 1990 1.52
EpDE 1990 1.71 E RAdeg 3.2 E DEdeg 3.2 Posflg P
Corr -0.2
SAO
SAO 238986 DelFlag RA1950 PmRA1950 -0.0035
DE1950 PmDE1950 -0.006 Vmag 4.3 SpType B5
Double code Source 74 CatNum 428 DM CP-53 4498
DMcomp BDsup HD 98718 M HD 0
GC 15601 RA1950rad 2.96147109 DE1950rad -0.94626066 PmRA2000 -0.0035
PmDE2000 -0.003
Hipparcos
Catalog H HIP 55425 Proxy H RAhms 11 21 00.44
DEdms -54 29 27.7 Vmag 3.9 VarFlag R Vmag G
RAdeg 170.252 DEdeg -54.491 AstroRef A Plx 10.15
CCDM 11210-5429 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 129 Rho 0.417 HD 98718 BD
CD CP CP-53 4498 Dm number -53 4498 VIred -0.16
SpType B5Vn R SpType Coord arcsec 2000 112100.44-542927.7
Hipparcos 2
HIP 55425 Sn 17 So 3 Nc 2
RArad 2.9714552059 DErad -0.9510476067 Plx 9.12 PmRA -35.85
PmDE -1.72 E RArad 0.29 E DErad 0.23 E Plx 0.34
E pmRA 0.34 E pmDE 0.27 Hpmag 3.8358 E Hpmag 0.0006
SHp 0.006 VA 0 BV -0.157 E BV 0.015
VI -0.16
CCDM
Ccdm 11210-5429 RComp Comp A Note1
Note2 Discov num DRAs 0.48 DDEs -27.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 4.6 Sp B5 PmNote *
PmRA -30 PmDE -6 Dm number -53 4498 Cat1 CPD
Name2 238986 Cat2 SAO HD 98718 M HD
ADS BDS M ADS BDS N IDS IDS 11164S5357A
HIC 55425
 
 
11210-5429 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 112100.42-542927.8 Mag 5.65 PmRA -40.00
PmDE -3.0 Calc delta mag 1.57 Calc coord yes
CCDM
Ccdm 11210-5429 RComp Comp B Note1 *
Note2 Discov num I 879 DRAs DDEs
R dRAs Year 1912 Theta Rho
Obs 99 Vmag 5.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 11164S5357B
HIC 55425