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Doubles in session


Current system
18128+0549
STT 345 AB
HD 166958


Nearby doubles
11' : 18135+0548
FOX 80AB

19' : 18135+0604
NSN 703

22' : 18142+0545
TDT 756AB

25' : 18136+0527
LDS1007

25' : 18116+0606
CFN 14

27' : 18112+0559
J 805

27' : 18124+0524
OSO 95

37' : 18152+0533
J 2123AB

50' : 18125+0501
HEI 896

53' : 18096+0609
STF2283

54' : 18127+0456
BAL2921

56' : 18122+0455
HEI9010

57' : 18122+0453
BAL2918

67' : 18123+0656
DBR 289

68' : 18122+0442
BAL2919

70' : 18125+0440
BAL2920

71' : 18151+0448
BAL2923

73' : 18165+0637
TDS 912

80' : 18155+0441
BAL2924

81' : 18182+0557
HJ 2830

84' : 18170+0454
BAL2926

85' : 18090+0447
TDT 710

88' : 18073+0617
TDT 694

90' : 18163+0702
LDS5233

91' : 18140+0718
LDS5230

91' : 18162+0434
STTA167



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.

18128+0549 STT 345 AB (HD 166958)

 
 
18h 12m 49.00s +05° 49' 21.0" P.A. 67.00 sep 1.5 mag 7.74,9.77 Sp B9 dist. 190.11 pc (620.14 l.y.)
 
 
Coord 2000 18128+0549 Discov num STT 345 Comp AB Coord arcsec 2000 18 12 49.00 +05 49 21.0
Date first 1843 Date last 2016 Obs 28
Pa first 57 Pa last 66.7 P.A. Now (θ) 66.7°
Sep first 0.9 Sep last 1.486 Sep. Now (ρ) 1.486"
Mag pri 7.74 Mag sec 9.77 delta mag (ΔM) 2.03 Spectral class B9 (blue-white)
Pri motion ra -013 Sec motion ra -013
Pri motion dec -018 Sec motion dec -018
Notes
Nature of this double is uncertain.
 
 
18128+0549 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 166958 123254 18 12 49 +05 49 21 STT 345 AB 2016 28 67 1.5 7.74 9.77 2.03 <===
Show 123254 18 12 49 +05 49 21 STT 345 AC 2015 16 199 86.5 7.74 9.64 1.90
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166958 Constellation Ophiuchus SAO 123254 HIP 89252
Tycho2 0443-00519-1 Gaia DR2 4471725987885718144 HD 166958 BD BD+05 3643
Distance 190.11 Distance ly 620.14
 
 
WDS 18128+0549 STT 345 AB (HD 166958) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
STTA (O. Struve DD - Appendix list) ...................
Stt1864 Ma - Struve, O. 1864MNRAS..24..149S
Stt1864 MNRAS 24, 149, 1864
Stt1866 orb - Struve, O. .
Stt1866 Bull. Imp. Acad. Sci. St. Petersburg, 1866
Stt1874 orb - Struve, O. .
Stt1874 Compte Rendus 79, 1467, 1874
Stt1875 orb - Struve, O. 1875MNRAS..35..367S
Stt1875 MNRAS 35, 367, 1875
Stt1878 Ma - Struve, O. 1878ObPul...9....1S
Stt1878 Pulkova Observations 9, 1, 1878
Stt1879A Ma - Struve, O. 1879Obs.....2..304G
Stt1879A cited by Gledhill (Obs 2, 304, 1879)
Stt1879B Ma - Struve, O. 1879Obs.....3..245G
Stt1879B cited by Gledhill (Obs 3, 245, 1879)
Stt1879C Ma - Struve, O. 1879Obs.....2..344G
Stt1879C cited by Gledhill (Obs 2, 344, 1879)
Stt1880A Ma - Struve, O. 1880Obs.....2..605H
Stt1880A cited by Hunt (Obs. 3, 605, 1880)
Stt1880B Ma - Struve, O. 1880Obs.....3..535G
Stt1880B cited by Gledhill (Obs 3, 535, 1880)
Stt1880C Ma - Struve, O. 1880MNRAS..40..497B
Stt1880C cited by Burnham (MNRAS 40, 497, 1880)
Stt1884A Ma - Struve, O. 1884AReg...22..216S
Stt1884A cited by Sadler (Astr. Register 22, 216, 1884)
Stt1893a Ma j Struve, O. 1893ObPul..10....1S
Stt1893a Pulkova Obs. Observations 10, 1, 1893
Stt1906A Ma - Struve, O. 1906MmRAS..56....1L
Stt1906A cited by Lewis (MemRAS 56, 1, 1906)
Stt1906B Ma j Struve, O. 1906QB821.B972.....
Stt1906B cited in BDS (Burnham Double Star Cat., 1906)
Stt1908A Ma - Struve, O. 1908MNRAS..68..465B
Stt1908A cited by Barnard (MNRAS 68, 465, 1908)
Stt1913A Ma - Struve, O. 1913QB811.B8.......
Stt1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Stt1914A Ma - Struve, O. 1914AN....198..107R
Stt1914A cited by Rabe (AN 198, 107, 1914)
Stt1932A Ma - Struve, O. 1932QB821.A43......
Stt1932A cited in ADS (Aitken Double Star Cat., 1932)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18128+0549 STT 345 AB 1991 24 65 1.5 7.74 9.77 B9 D 181249.00+054921.0
18128+0549 STT 345 AB 2011 26 66 1.5 7.74 9.77 B9 181249.00+054921.0
18128+0549 STT 345 AB 2016 27 67 1.5 7.74 9.77 B9 181249.00+054921.0

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

 
 
WDS 18128+0549 STT 345 AB (HD 166958) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18128+0549 STT 345 AB (HD 166958) : MEASURES
 
 
No records found.

 
 
WDS 18128+0549 (HD 166958) : VIRTUAL EYEPIECE
 
 

18128+0549 STT 345A mag 7.74 Sp B9 18128+0549 STT 345B sep 1.5 P.A. 66.60 mag 9.77 18128+0549 STT 345C sep 86.4 P.A. 198.70 mag 9.64 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 18128+0549 (HD 166958) : ALADIN DSS IMAGE @ 18h 12m 49.00s +05° 49' 21.0"
 
 
 
 
WDS 18128+0549 STT 345 AB (HD 166958) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18128+0549 STT 345AB distance=1' 18128+0549 STT 345AC distance=1' 18135+0548 FOX 80AB distance=11' 18135+0548 FOX 80AC distance=11' 18135+0604 NSN 703 distance=19' 18142+0545 TDT 756AB distance=22' 18142+0545 GII 262Aa,Ab distance=22' 18136+0527 LDS1007 distance=25' 18116+0606 CFN 14 distance=25' 18112+0559 J 805 distance=27' 18124+0524 OSO 95 distance=27' 18152+0533 J 2123AB distance=37' 18152+0533 J 2123AC distance=37' 18125+0501 HEI 896 distance=50' 18096+0609 STF2283 distance=53' 18127+0456 BAL2921 distance=54' 18122+0455 HEI9010 distance=56' 18122+0453 BAL2918 distance=57' 18123+0656 DBR 289 distance=67' 18122+0442 BAL2919 distance=68' 18125+0440 BAL2920 distance=70' 18151+0448 BAL2923 distance=71' 18165+0637 TDS 912 distance=73' 18155+0441 BAL2924 distance=80' 18182+0557 HJ 2830 distance=81' 18170+0454 BAL2926 distance=84' 18090+0447 TDT 710 distance=85' 18073+0617 TDT 694 distance=88' 18163+0702 LDS5233 distance=90' 18140+0718 LDS5230 distance=91' 18162+0434 STTA167 distance=91' 18159+0430 BAL2925AB distance=92' 18159+0430 J 2670AC distance=92' 18146+0422 BAL2922AB distance=92' 18146+0422 BAL2922AC distance=92' 18082+0449 BAL2914 distance=92' 18146+0422 BAL2922BC distance=92' 18124+0415 A 353 distance=95' 18144+0415 SLE 143 distance=98' 18107+0417 BAL2917 distance=98' 18063+0613 GWP2759 distance=101' 18158+0711 LDS5232 distance=101' 18188+0501 TDS 914 distance=102' 18098+0412 BAL2916 distance=108' 18066+0452 BAL2913 distance=109' 18181+0709 LDS5234 distance=114' 18106+0738 HDS2562AB distance=114' 18106+0738 GII 260Aa,Ab distance=114' 18128+0356 J 3270 distance=115' 18060+0455 BAL2912 distance=116' 18157+0400 BAL2484AB distance=118' 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 18128+0549 STT 345 AB 67 1.5 1
Show 18128+0549 STT 345 AC 199 86.5 1
Show 18135+0548 FOX 80 AB 64 3.0 11
Show 18135+0548 FOX 80 AC 48 9.9 11
Show 18135+0604 NSN 703 270 25.8 19
Show 18142+0545 TDT 756 AB 92 0.7 22
Show 18142+0545 GII 262 Aa,Ab 39 0.2 22
Show 18136+0527 LDS1007 13 322.2 25
Show 18116+0606 CFN 14 140 0.6 25
Show 18112+0559 J 805 96 3.7 27
Show 18124+0524 OSO 95 202 11.2 27
Show 18152+0533 J 2123 AB 138 4.0 37
Show 18152+0533 J 2123 AC 52 7.0 37
Show 18125+0501 HEI 896 202 2.6 50
Show 18096+0609 STF2283 48 0.5 53
Show 18127+0456 BAL2921 1 19.5 54
Show 18122+0455 HEI9010 123 6.1 56
Show 18122+0453 BAL2918 54 8.1 57
Show 18123+0656 DBR 289 242 1.3 67
Show 18122+0442 BAL2919 329 6.1 68
Show 18125+0440 BAL2920 1 7.7 70
Show 18151+0448 BAL2923 17 16.1 71
Show 18165+0637 TDS 912 198 1.2 73
Show 18155+0441 BAL2924 222 19.9 80
Show 18182+0557 HJ 2830 94 11.4 81
Show 18170+0454 BAL2926 191 10.7 84
Show 18090+0447 TDT 710 274 1.1 85
Show 18073+0617 TDT 694 13 1.5 88
Show 18163+0702 LDS5233 22 4.8 90
Show 18140+0718 LDS5230 51 5.1 91
Show 18162+0434 STTA167 73 53.0 91
Show 18159+0430 BAL2925 AB 223 8.3 92
Show 18159+0430 J 2670 AC 70 29.0 92
Show 18146+0422 BAL2922 AB 120 10.7 92
Show 18146+0422 BAL2922 AC 76 60.8 92
Show 18082+0449 BAL2914 329 8.9 92
Show 18146+0422 BAL2922 BC 104 49.2 92
Show 18124+0415 A 353 17 1.6 95
Show 18144+0415 SLE 143 41 15.2 98
Show 18107+0417 BAL2917 258 19.7 98
Show 18063+0613 GWP2759 227 122.8 101
Show 18158+0711 LDS5232 270 5.2 101
Show 18188+0501 TDS 914 354 0.8 102
Show 18098+0412 BAL2916 122 6.6 108
Show 18066+0452 BAL2913 14 12.4 109
Show 18181+0709 LDS5234 31 3.9 114
Show 18106+0738 HDS2562 AB 245 0.9 114
Show 18106+0738 GII 260 Aa,Ab 38 0.2 114
Show 18128+0356 J 3270 232 4.8 115
Show 18060+0455 BAL2912 187 3.1 116
Show 18157+0400 BAL2484 AB 357 8.0 118

 
 
WDS 18128+0549 : COMPONENTS
 
 
  A B
B pa=66.6°
sep=1.48"
 
C pa=198.7°
sep=86.42"
pa=199.4°
sep=87.42"
 
 
18128+0549 A
 
 
Name HD 166958 Coord arcsec 2000 181249.00+054921.0 Mag 7.74 Spectral class B9 (blue-white)
PmRA -13.00 PmDE -18.0 SAO 123254 HIP 89252
Tycho2 0443-00519-1 HD 166958 BD BD+05 3643
Tycho2
Tycho2 0443-00519-1 Pflag P RAmdeg 273.20415634 DEmdeg 5.82246472
PmRA -13.4 PmDE -18.0 E RAmdeg 5 E DEmdeg 6
E pmRA 1.5 E pmDE 1.5 EpRAm 1991.58 EpDEm 1991.45
Num 7 Q RAmdeg 1.8 Q DEmdeg 0.8 Q pmRA 1.9
Q pmDE 0.8 BTmag 7.777 E BTmag 0.016 VTmag 7.743
E VTmag 0.012 Prox 15 TYC T HIP 89252
CCDM A RAdeg 273.20416833 DEdeg 5.82249722 EpRA 1990 1.73
EpDE 1990 1.68 E RAdeg 5.0 E DEdeg 5.6 Posflg D
Corr 0.2
SAO
SAO 123254 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 -0.013 Vmag 8.4 SpType B9
Double code Source 32 CatNum 8354 DM BD+05 3643
DMcomp A BDsup HD 166958 M HD 0
GC RA1950rad 4.75762635 DE1950rad 0.10137926 PmRA2000 0.0006
PmDE2000 -0.013
Hipparcos
Catalog H HIP 89252 Proxy H RAhms 18 12 49.00
DEdms +05 49 21.0 Vmag 7.59 VarFlag R Vmag H
RAdeg 273.204 DEdeg 5.8225 AstroRef A Plx 5.78
CCDM 18128+0549 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 66 Rho 1.461 HD 166958 BD BD+05 3643
CD CP Dm number +05 3643 VIred 0.06
SpType B9 R SpType Coord arcsec 2000 181249.00+054921.0
Hipparcos 2
HIP 89252 Sn 15 So 3 Nc 2
RArad 4.7683123175 DErad 0.1016217673 Plx 5.26 PmRA -11.25
PmDE -12.97 E RArad 0.89 E DErad 0.69 E Plx 0.98
E pmRA 1.11 E pmDE 0.83 Hpmag 7.6096 E Hpmag 0.0013
SHp 0.011 VA 0 BV 0.144 E BV 0.139
VI 0.06
CCDM
Ccdm 18128+0549 RComp Comp A Note1
Note2 Discov num DRAs 0.97 DDEs 21.6
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.1 Sp B9 PmNote *
PmRA -21 PmDE -3 Dm number +05 3643 Cat1 BD
Name2 +05 2428 Cat2 AGK2/3 HD 166958 M HD
ADS BDS A11160 M ADS BDS N IDS IDS 18079N0548A
HIC 89252
 
 
18128+0549 B
 
 
Coord arcsec 2000 181249.09+054921.6 Mag 9.77 PmRA -13.00 PmDE -18.0
Tycho2 0443-00519-2 Calc delta mag 2.03 Calc coord yes
Tycho2
Tycho2 0443-00519-2 Pflag P RAmdeg 273.20415634 DEmdeg 5.82246472
PmRA -13.4 PmDE -18.0 E RAmdeg 5 E DEmdeg 6
E pmRA 1.5 E pmDE 1.5 EpRAm 1991.58 EpDEm 1991.45
Num 7 Q RAmdeg 1.8 Q DEmdeg 0.8 Q pmRA 1.9
Q pmDE 0.8 BTmag 10.263 E BTmag 0.040 VTmag 9.774
E VTmag 0.035 Prox 15 TYC HIP 89252
CCDM B RAdeg 273.20454361 DEdeg 5.82267389 EpRA 1990 1.73
EpDE 1990 1.70 E RAdeg 21.6 E DEdeg 26.1 Posflg D
Corr 0.2
CCDM
Ccdm 18128+0549 RComp Comp B Note1
Note2 Discov num STT 345 DRAs DDEs
R dRAs Year 1845 Theta 064 Rho 1.3
Obs 15 Vmag 11.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11160 M ADS BDS N IDS IDS 18079N0548B
HIC 89252
 
 
18128+0549 C
 
 
Coord arcsec 2000 181247.14+054759.1 Mag 9.64 PmRA 2.00 PmDE -9.0
Tycho2 0443-01635-1 Calc delta mag 1.9 Calc coord yes
Tycho2
Tycho2 0443-01635-1 Pflag RAmdeg 273.19628456 DEmdeg 5.79971521
PmRA 1.5 PmDE -10.8 E RAmdeg 14 E DEmdeg 16
E pmRA 1.6 E pmDE 1.6 EpRAm 1990.05 EpDEm 1989.16
Num 8 Q RAmdeg 0.7 Q DEmdeg 1.1 Q pmRA 0.8
Q pmDE 1.1 BTmag 9.775 E BTmag 0.028 VTmag 9.643
E VTmag 0.030 Prox 867 TYC T HIP
CCDM RAdeg 273.19628250 DEdeg 5.79974278 EpRA 1990 1.80
EpDE 1990 1.68 E RAdeg 15.3 E DEdeg 18.3 Posflg
Corr 0.4
CCDM
Ccdm 18128+0549 RComp Comp C Note1
Note2 Discov num STT 345 DRAs -0.89 DDEs -61.5
R dRAs 10 Year 1909 Theta 200 Rho 87.4
Obs 1 Vmag 9.5 Sp A2 PmNote *
PmRA -1 PmDE -15 Dm number Cat1
Name2 +05 2427 Cat2 AGK2/3 HD M HD
ADS BDS A11160 M ADS BDS N IDS IDS 18079N0548C
HIC