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Current system
17194-4413
HDO 269
HD 156398


Nearby doubles
24' : 17204-4352
TDT 313

29' : 17193-4441
CPO 518

30' : 17195-4443
TDT 305

33' : 17207-4443
CPO 519

33' : 17187-4446
BRT 955AB

37' : 17162-4426
SKF1415

52' : 17241-4425
DON 834

56' : 17149-4441
HDS2438

58' : 17242-4348
HU 1523

64' : 17246-4445
DON 836

65' : 17157-4504
BRT 953

70' : 17145-4329
DON 829

73' : 17135-4447
DON 828

73' : 17213-4523
CPO 520

73' : 17237-4510
I 593

73' : 17260-4403
DON 837

74' : 17259-4352
TDT 346

74' : 17253-4451
SKF1055

75' : 17217-4524
DON 831

76' : 17213-4526
BRT 958

78' : 17184-4256
TDS 861

79' : 17267-4407
I 1083

81' : 17188-4254
SNA 68

82' : 17170-4531
BRT 954

82' : 17270-4408
TDT 357

85' : 17252-4512
B 1856



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

17194-4413 HDO 269 (HD 156398)

 
 
17h 19m 24.63s -44° 13' 22.8" P.A. 233.00 sep 0.1 mag 7.30,7.50 Sp B9.5III dist. 325.73 pc (1062.53 l.y.)
 
 
Coord 2000 17194-4413 Discov num HDO 269 Comp Coord arcsec 2000 17 19 24.63 -44 13 22.8
Date first 1897 Date last 2017 Obs 29
Pa first 350 Pa last 233.2 P.A. Now (θ) 233.2°
Sep first 0.6 Sep last 0.104 Sep. Now (ρ) 0.104"
Mag pri 7.30 Mag sec 7.50 delta mag (ΔM) 0.2 Spectral class B9.5III (blue-white)
Pri motion ra +007 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 156398 Constellation Scorpius SAO 227821 HIP 84748
Tycho2 7882-00057-1 Gaia DR2 5953285848666591232 HD 156398 HR 6427
GC 23367 CD CD-4411595 CP CP-44 8358 Distance 325.73
Distance ly 1062.53
 
 
ORBITAL ELEMENTS
 
 
Period (P)1700y Periastron (T)1999.5y Semi-major axis (a)0.806a
Eccentricity (e)0.949 Inclination (i)72.4° Longitude of periastron (ω)112.7°
Node (Ω)27.7° Notesn ReferenceTok2018b
Equinox2000 Last observation2017 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 184.7 0.026
2001 197.3 0.039
2002 203.8 0.051
2003 208.1 0.060
2004 211.4 0.067
2005 214.1 0.073
2006 216.4 0.078
2007 218.5 0.082
2008 220.4 0.085
2009 222.1 0.088
2010 223.7 0.091
2011 225.3 0.094
2012 226.7 0.096
2013 228.1 0.098
2014 229.5 0.100
2015 230.8 0.101
2016 232.0 0.103
2017 233.3 0.104
2018 234.4 0.105
2019 235.6 0.107
2020 236.7 0.108
2021 237.9 0.109
2022 239.0 0.110
2023 240.0 0.111
2024 241.1 0.112
2025 242.1 0.113
2026 243.1 0.114
2027 244.1 0.115
2028 245.1 0.116
2029 246.1 0.117
2030 247.1 0.117


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


 
  


wds17194-4413a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 17194-4413 HDO 269 (HD 156398) : NOTES
 
 
discov_num notes refcode
HDO 269 Spectrum composite; B9.5V+A6III.
 
 
REFERENCES
 
 
refcode metd author reference
Tok2018b orb j Tokovinin, A. 2018IAUDS.194....1T
Tok2018b Inf. Circ. 194, 1, 2018
 
 
DISCOVERER
 
 
idgroup discov author
1 HDO Harvard Obs.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17194-4413 HDO 269 1992 22 34 0.1 7.30 7.50 N 171924.63-441322.8
17194-4413 HDO 269 2009 25 222 0.1 7.30 7.50 N 171924.63-441322.8
17194-4413 HDO 269 2014 26 50 0.1 7.30 7.50 B9.5III N 171924.63-441322.8
17194-4413 HDO 269 2017 29 233 0.1 7.30 7.50 B9.5III NO 171924.63-441322.8

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

 
 
WDS 17194-4413 HDO 269 (HD 156398) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17194-4413 HDO 269 (HD 156398) : MEASURES
 
 
No records found.

 
 
WDS 17194-4413 (HD 156398) : VIRTUAL EYEPIECE
 
 

17194-4413 HDO 269A mag 7.3 Sp B9.5III 17194-4413 HDO 269B sep 0.1 P.A. 223.80 mag 7.5 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 17194-4413 (HD 156398) : ALADIN DSS IMAGE @ 17h 19m 24.63s -44° 13' 22.8"
 
 
 
 
WDS 17194-4413 HDO 269 (HD 156398) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17194-4413 HDO 269 distance=0' 17204-4352 TDT 313 distance=24' 17193-4441 CPO 518 distance=29' 17195-4443 TDT 305 distance=30' 17207-4443 CPO 519 distance=33' 17187-4446 BRT 955AB distance=33' 17187-4446 BRT 955AC distance=33' 17162-4426 SKF1415 distance=37' 17241-4425 DON 834 distance=52' 17149-4441 HDS2438 distance=56' 17242-4348 HU 1523 distance=58' 17246-4445 DON 836 distance=64' 17157-4504 BRT 953 distance=65' 17145-4329 DON 829 distance=70' 17135-4447 DON 828 distance=73' 17213-4523 CPO 520 distance=73' 17237-4510 I 593 distance=73' 17260-4403 DON 837 distance=73' 17259-4352 TDT 346 distance=74' 17253-4451 SKF1055 distance=74' 17217-4524 DON 831 distance=75' 17213-4526 BRT 958 distance=76' 17184-4256 TDS 861 distance=78' 17267-4407 I 1083 distance=79' 17188-4254 SNA 68 distance=81' 17170-4531 BRT 954 distance=82' 17270-4408 TDT 357 distance=82' 17252-4512 B 1856 distance=85' 17274-4416 DON 839 distance=86' 17112-4416 CPO 514AB distance=89' 17112-4416 SIN 101AC distance=89' 17123-4330 SKF1413 distance=89' 17146-4528 COO 210AB distance=91' 17228-4537 EVS 30AB distance=91' 17228-4537 EVS 30AC distance=91' 17228-4537 GAA 15Aa,Ab distance=91' 17257-4516 B 1857 distance=92' 17208-4240 I 410 distance=96' 17107-4433 I 1312 distance=96' 17135-4527 B 900 distance=97' 17206-4549 BRT 957 distance=98' 17122-4314 GAT 21 distance=99' 17164-4240 FGS 28 distance=99' 17118-4314 I 587 distance=102' 17103-4450 CPO 512 distance=105' 17106-4331 B 1849 distance=105' 17290-4358 DUN 217 distance=105' 17259-4251 BRT 966 distance=108' 17184-4603 DON 830 distance=110' 17099-4453 BRT 949 distance=110' 17181-4605 HJ 4929 distance=113' 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 17194-4413 HDO 269 233 0.1
Show 17204-4352 TDT 313 96 1.3 24
Show 17193-4441 CPO 518 253 3.3 29
Show 17195-4443 TDT 305 320 0.5 30
Show 17207-4443 CPO 519 223 5.7 33
Show 17187-4446 BRT 955 AB 290 3.1 33
Show 17187-4446 BRT 955 AC 149 5.6 33
Show 17162-4426 SKF1415 26 4.9 37
Show 17241-4425 DON 834 20 1.6 52
Show 17149-4441 HDS2438 187 10.0 56
Show 17242-4348 HU 1523 266 7.4 58
Show 17246-4445 DON 836 87 1.3 64
Show 17157-4504 BRT 953 304 6.5 65
Show 17145-4329 DON 829 348 1.8 70
Show 17135-4447 DON 828 84 0.5 73
Show 17213-4523 CPO 520 70 5.3 73
Show 17237-4510 I 593 282 0.8 73
Show 17260-4403 DON 837 328 3.8 73
Show 17259-4352 TDT 346 94 0.4 74
Show 17253-4451 SKF1055 47 7.6 74
Show 17217-4524 DON 831 30 0.3 75
Show 17213-4526 BRT 958 210 2.8 76
Show 17184-4256 TDS 861 354 1.7 78
Show 17267-4407 I 1083 318 0.8 79
Show 17188-4254 SNA 68 20 6.4 81
Show 17170-4531 BRT 954 53 3.5 82
Show 17270-4408 TDT 357 282 0.6 82
Show 17252-4512 B 1856 140 1.6 85
Show 17274-4416 DON 839 274 2.4 86
Show 17112-4416 CPO 514 AB 133 5.7 89
Show 17112-4416 SIN 101 AC 12.5 89
Show 17123-4330 SKF1413 198 6.9 89
Show 17146-4528 COO 210 AB 340 5.5 91
Show 17228-4537 EVS 30 AB 268 14.4 91
Show 17228-4537 EVS 30 AC 215 18.0 91
Show 17228-4537 GAA 15 Aa,Ab 235 0.0 91
Show 17257-4516 B 1857 51 4.5 92
Show 17208-4240 I 410 279 2.9 96
Show 17107-4433 I 1312 125 13.0 96
Show 17135-4527 B 900 280 0.5 97
Show 17206-4549 BRT 957 313 3.1 98
Show 17122-4314 GAT 21 129 591.8 99
Show 17164-4240 FGS 28 -1 -1.0 99
Show 17118-4314 I 587 143 5.5 102
Show 17103-4450 CPO 512 165 6.0 105
Show 17106-4331 B 1849 223 2.3 105
Show 17290-4358 DUN 217 168 13.4 105
Show 17259-4251 BRT 966 96 2.9 108
Show 17184-4603 DON 830 98 2.3 110
Show 17099-4453 BRT 949 33 5.0 110
Show 17181-4605 HJ 4929 226 10.6 113

 
 
WDS 17194-4413 : COMPONENTS
 
 
  A
B pa=223.8°
sep=0.09"
 
 
17194-4413 A
 
 
Componente originario normalizzato AB Name HD 156398 Coord arcsec 2000 171924.63-441322.8 Mag 7.3
Spectral class B9.5III (blue-white) PmRA 7.00 PmDE -16.0 SAO 227821
HIP 84748 Tycho2 7882-00057-1 HD 156398 HR 6427
GC 23367 CD CD-4411595 CP CP-44 8358
Tycho2
Tycho2 7882-00057-1 Pflag RAmdeg 259.85262835 DEmdeg -44.22303116
PmRA 1.7 PmDE -11.8 E RAmdeg 4 E DEmdeg 5
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.23 EpDEm 1990.73
Num 12 Q RAmdeg 1.5 Q DEmdeg 0.8 Q pmRA 1.6
Q pmDE 0.8 BTmag 6.865 E BTmag 0.015 VTmag 6.679
E VTmag 0.010 Prox 999 TYC T HIP 84748
CCDM RAdeg 259.85262194 DEdeg -44.22300250 EpRA 1990 1.60
EpDE 1990 1.28 E RAdeg 4.2 E DEdeg 4.6 Posflg
Corr 0.0
SAO
SAO 227821 DelFlag RA1950 PmRA1950 -0.0006
DE1950 PmDE1950 -0.015 Vmag 6.9 SpType A0
Double code Source 70 CatNum 23367 DM CD-4411595
DMcomp BDsup HD 156398 M HD 0
GC 23367 RA1950rad 4.51945104 DE1950rad -0.77094042 PmRA2000 -0.0006
PmDE2000 -0.015
Hipparcos
Catalog H HIP 84748 Proxy RAhms 17 19 24.63
DEdms -44 13 22.8 Vmag 6.64 VarFlag R Vmag G
RAdeg 259.853 DEdeg -44.223 AstroRef Plx 3.51
CCDM 17194-4413 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 156398 BD
CD CD-4411595 CP CP-44 8358 Dm number -4411595 VIred 0.29
SpType B9III R SpType Coord arcsec 2000 171924.63-441322.8
Hipparcos 2
HIP 84748 Sn 5 So 0 Nc 1
RArad 4.5352838154 DErad -0.7718369453 Plx 3.07 PmRA 1.82
PmDE -11.88 E RArad 0.5 E DErad 0.27 E Plx 0.52
E pmRA 0.58 E pmDE 0.29 Hpmag 6.7047 E Hpmag 0.0013
SHp 0.008 VA 0 BV 0.211 E BV 0.015
VI 0.29
CCDM
Ccdm 17194-4413 RComp Comp A Note1
Note2 Discov num DRAs 0.58 DDEs -23.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.5 Sp A0 PmNote *
PmRA -3 PmDE -16 Dm number -4411595 Cat1 CD
Name2 227821 Cat2 SAO HD 156398 M HD
ADS BDS M ADS BDS N IDS IDS 17122S4407A
HIC 84748
 
 
17194-4413 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 171924.62-441322.9 Mag 7.5 Calc delta mag 0.2
Calc coord yes
CCDM
Ccdm 17194-4413 RComp Comp B Note1
Note2 Discov num HDO 269 DRAs DDEs
R dRAs Year 1901 Theta 015 Rho 0.3
Obs 16 Vmag 7.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 17122S4407B
HIC 84748