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Doubles in session


Current system
18421+3445
BLL 34 BC


Nearby doubles
10' : 18430+3445
SEI 572AB

15' : 18425+3432
POP 45

16' : 18426+3459
UC 3650

20' : 18416+3503
GRV 237

20' : 18420+3505
SEI 570

24' : 18438+3433
SEI 573

31' : 18403+3425
HDS2645AB

37' : 18394+3430
SEI 568

43' : 18390+3501
POP 17

48' : 18458+3431
STF2390

49' : 18393+3517
HJ 1335

50' : 18385+3503
COU1308

51' : 18434+3533
STF2378AB

54' : 18445+3400
STTA172

55' : 18464+3500
SLE 367

57' : 18379+3505
POP 16AB

57' : 18416+3541
KPP4116

57' : 18379+3506
TRA 1

58' : 18380+3417
LDS4793

59' : 18380+3416
CRB 128

61' : 18452+3532
STF2386AB

63' : 18465+3414
COU1153

65' : 18370+3452
STF2352AB

72' : 18366+3505
COU1307

73' : 18475+3415
KPP4122

77' : 18360+3452
TDT 953



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 18421+3445 : COMPONENTS
 
 
  A Ab B
Ab pa=20.4°
sep=0.12"
 
B pa=82.3°
sep=24.75"
pa=82.6°
sep=24.69"
 
C pa=64.4°
sep=96.65"
pa=64.4°
sep=96.56"
pa=58.4°
sep=73.50"
 
 
18421+3445 A
 
 
Name HD 173087 Coord arcsec 2000 184208.09+344446.7 Mag 6.45 Spectral class B5V (blue-white)
PmRA 0.00 PmDE -4.0 SAO 67265 HIP 91707
Tycho2 2645-02013-1 HD 173087 HR 7033 GC 25597
BD BD+34 3285
Tycho2
Tycho2 2645-02013-1 Pflag RAmdeg 280.53369743 DEmdeg 34.74630883
PmRA 1.0 PmDE -2.3 E RAmdeg 4 E DEmdeg 4
E pmRA 1.3 E pmDE 1.4 EpRAm 1991.47 EpDEm 1991.53
Num 10 Q RAmdeg 1.0 Q DEmdeg 0.8 Q pmRA 1.1
Q pmDE 0.7 BTmag 6.316 E BTmag 0.014 VTmag 6.453
E VTmag 0.010 Prox 250 TYC T HIP 91707
CCDM A RAdeg 280.53369444 DEdeg 34.74631389 EpRA 1990 1.62
EpDE 1990 1.67 E RAdeg 3.7 E DEdeg 3.6 Posflg
Corr 0.1
SAO
SAO 67265 DelFlag RA1950 PmRA1950 0.0005
DE1950 PmDE1950 0.008 Vmag 6.1 SpType B5
Double code Source 70 CatNum 25597 DM BD+34 3285
DMcomp BDsup HD 173087 M HD 0
GC 25597 RA1950rad 4.88836714 DE1950rad 0.60557079 PmRA2000 0.0008
PmDE2000 0.008
Hipparcos
Catalog H HIP 91707 Proxy RAhms 18 42 08.09
DEdms +34 44 46.7 Vmag 6.49 VarFlag R Vmag H
RAdeg 280.534 DEdeg 34.7463 AstroRef A Plx 2.47
CCDM 18422+3445 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source P Qual A M HIP
Theta Rho HD 173087 BD BD+34 3285
CD CP Dm number +34 3285 VIred -0.13
SpType B5V R SpType Coord arcsec 2000 184208.09+344446.7
Hipparcos 2
HIP 91707 Sn 95 So 3 Nc 1
RArad 4.8962366648 DErad 0.6064376081 Plx 2.19 PmRA 0.08
PmDE -4.2 E RArad 0.43 E DErad 0.52 E Plx 0.61
E pmRA 0.49 E pmDE 0.67 Hpmag 6.4518 E Hpmag 0.0089
SHp 0.022 VA 0 BV -0.116 E BV 0.005
VI -0.1
 
 
18421+3445 Ab
 
 
Coord arcsec 2000 184208.09+344446.8 Mag 7.5 Calc delta mag 1 Calc coord yes
 
 
18421+3445 B
 
 
Coord arcsec 2000 184210.08+344450.0 Coord calc 184210.08+344450.0 Mag 7.73 Spectral class A0 (white)
PmRA 1.00 PmDE -3.0 HIP 91712 Tycho2 2645-02012-1
BD BD+34 3286 Calc delta mag 1.23
Tycho2
Tycho2 2645-02012-1 Pflag RAmdeg 280.54206663 DEmdeg 34.74725057
PmRA 0.9 PmDE 0.4 E RAmdeg 5 E DEmdeg 5
E pmRA 2.1 E pmDE 2.2 EpRAm 1991.56 EpDEm 1991.55
Num 4 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.9
Q pmDE 0.9 BTmag 7.644 E BTmag 0.015 VTmag 7.729
E VTmag 0.011 Prox 250 TYC T HIP 91712
CCDM B RAdeg 280.54206417 DEdeg 34.74724972 EpRA 1990 1.62
EpDE 1990 1.61 E RAdeg 5.0 E DEdeg 4.7 Posflg
Corr 0.1
Hipparcos
Catalog H HIP 91712 Proxy RAhms 18 42 10.10
DEdms +34 44 50.1 Vmag 8.19 VarFlag R Vmag H
RAdeg 280.542 DEdeg 34.7472 AstroRef B Plx 8.76
CCDM 18422+3445 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source I Qual A M HIP
Theta Rho HD BD BD+34 3286
CD CP Dm number +34 3286 VIred -0.02
SpType B8.5V R SpType Coord arcsec 2000 184210.10+344450.1
Hipparcos 2
HIP 91712 Sn 95 So 3 Nc 1
RArad 4.896382973 DErad 0.606453751 Plx 2.83 PmRA -1.59
PmDE -13.69 E RArad 3.19 E DErad 3 E Plx 3.94
E pmRA 3.74 E pmDE 4.01 Hpmag 8.081 E Hpmag 0.0299
SHp 0 VA 0 BV -0.043 E BV 0.008
VI -0.02
 
 
18421+3445 C
 
 
Coord arcsec 2000 184215.16+344528.5 Mag 11.79 PmRA 1.00 PmDE -2.0
Tycho2 2645-01165-1 Calc delta mag 5.29 Calc coord yes
Tycho2
Tycho2 2645-01165-1 Pflag RAmdeg 280.56998017 DEmdeg 34.75804121
PmRA 3.3 PmDE -2.9 E RAmdeg 124 E DEmdeg 116
E pmRA 3.4 E pmDE 3.1 EpRAm 1961.33 EpDEm 1966.56
Num 4 Q RAmdeg 0.7 Q DEmdeg 1.7 Q pmRA 0.7
Q pmDE 1.7 BTmag 12.423 E BTmag 0.213 VTmag 11.792
E VTmag 0.177 Prox 913 TYC HIP
CCDM RAdeg 280.56998889 DEdeg 34.75806611 EpRA 1990 1.47
EpDE 1990 1.59 E RAdeg 168.8 E DEdeg 144.4 Posflg
Corr 0.2