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Computed Lists
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Doubles in session


Current system
18254-2033
JC 6
21 Sgr


Nearby doubles
17' : 18261-2019
SKF 101

23' : 18247-2012
OCC 409

24' : 18259-2053
BRT1537

31' : 18257-2102
HLD 144AB

40' : 18231-2009
DON 897

40' : 18258-1953
ARA 750

40' : 18278-2052
ARA1151

41' : 18264-2111
ARA1534

43' : 18281-2048
RSS 32

44' : 18223-2018
BHA 27

50' : 18246-1944
OCC 459

54' : 18230-2115
ARA1529

58' : 18216-2052
BRT1530

58' : 18282-2114
HJ 2832

61' : 18239-2129
BRT1535

61' : 18242-1935
BU 49AB

61' : 18237-1936
ARA 746

66' : 18236-2133
RST5112

66' : 18238-1930
LEO 16

69' : 18209-2004
ARA1148AB

70' : 18289-2122
HU 241AB

70' : 18239-2139
BRT1536

73' : 18273-2140
HU 239

73' : 18209-1956
RST3177

74' : 18280-2135
HU 240

74' : 18254-2146
ARA1533



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.
 
 
WDS 18254-2033 : COMPONENTS
 
 
  A
B pa=280.2°
sep=1.55"
 
 
18254-2033 A
 
 
Componente originario normalizzato AB Name 21 Sgr Coord arcsec 2000 182521.02-203229.9 Mag 5.03
Spectral class K1III (yellow-orange) PmRA 20.00 PmDE -23.0 SAO 186794
HIP 90289 Tycho2 6274-01663-1 HD 169420 HR 6896
GC 25132 BD BD-20 5134 Flamsteed 21 Sagittarii Flamsteed name 21 Sgr
Tycho2
Tycho2 6274-01663-1 Pflag P RAmdeg 276.33759697 DEmdeg -20.54164289
PmRA 20.1 PmDE -22.7 E RAmdeg 4 E DEmdeg 4
E pmRA 3.4 E pmDE 3.2 EpRAm 1991.70 EpDEm 1991.68
Num 3 Q RAmdeg 4.2 Q DEmdeg 1.8 Q pmRA 4.2
Q pmDE 1.8 BTmag 6.779 E BTmag 0.015 VTmag 5.029
E VTmag 0.009 Prox 17 TYC T HIP 90289
CCDM A RAdeg 276.33764611 DEdeg -20.54161417 EpRA 1990 1.72
EpDE 1990 1.70 E RAdeg 3.7 E DEdeg 4.1 Posflg D
Corr 0.4
SAO
SAO 186794 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 -0.026 Vmag 5 SpType +++
Double code Source 70 CatNum 25132 DM BD-20 5134
DMcomp BDsup HD 169420 M HD 9
GC 25132 RA1950rad 4.81000319 DE1950rad -0.35901859 PmRA2000 0.0005
PmDE2000 -0.025
Hipparcos
Catalog H HIP 90289 Proxy H RAhms 18 25 21.04
DEdms -20 32 29.8 Vmag 4.81 VarFlag R Vmag G
RAdeg 276.338 DEdeg -20.5416 AstroRef A Plx 5.46
CCDM 18254-2033 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 284 Rho 1.661 HD 169420 BD BD-20 5134
CD CP Dm number -20 5134 VIred 1.27
SpType A1/A2V R SpType Coord arcsec 2000 182521.04-203229.8
Hipparcos 2
HIP 90289 Sn 15 So 3 Nc 2
RArad 4.823001802 DErad -0.358518713 Plx 7.95 PmRA 8.46
PmDE -28.07 E RArad 0.75 E DErad 0.46 E Plx 0.72
E pmRA 0.93 E pmDE 0.57 Hpmag 4.9358 E Hpmag 0.001
SHp 0.005 VA 0 BV 1.31 E BV 0.042
VI 1.27
CCDM
Ccdm 18254-2033 RComp Comp A Note1
Note2 Discov num DRAs -2.89 DDEs 29.0
R dRAs 41 Year Theta Rho
Obs 2 Vmag 5.1 Sp K0 PmNote *
PmRA 8 PmDE -26 Dm number -20 5134 Cat1 BD
Name2 186794 Cat2 SAO HD 169420 M HD
ADS BDS A11325 M ADS BDS N IDS IDS 18194S2036A
HIC 90289
 
 
18254-2033 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 182520.91-203229.6 Mag 7.43 Spectral class A1V (white)
PmRA 20.00 PmDE -23.0 Tycho2 6274-01663-2 HD 169421
Calc delta mag 2.4 Calc coord yes
Tycho2
Tycho2 6274-01663-2 Pflag P RAmdeg 276.33759697 DEmdeg -20.54164289
PmRA 20.1 PmDE -22.7 E RAmdeg 4 E DEmdeg 4
E pmRA 3.4 E pmDE 3.2 EpRAm 1991.70 EpDEm 1991.68
Num 3 Q RAmdeg 4.2 Q DEmdeg 1.8 Q pmRA 4.2
Q pmDE 1.8 BTmag 7.742 E BTmag 0.017 VTmag 7.430
E VTmag 0.012 Prox 17 TYC HIP 90289
CCDM B RAdeg 276.33717000 DEdeg -20.54150000 EpRA 1990 1.66
EpDE 1990 1.68 E RAdeg 5.5 E DEdeg 6.3 Posflg D
Corr 0.3
CCDM
Ccdm 18254-2033 RComp Comp B Note1
Note2 Discov num JC 6 DRAs DDEs
R dRAs Year 1959 Theta 289 Rho 1.8
Obs 26 Vmag 7.6 Sp A0 PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD 169421 M HD
ADS BDS A11325 M ADS BDS N IDS IDS 18194S2036B
HIC 90289