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Doubles in session


Current system
18374+7741
STT 363
HD 173831


Nearby doubles
19' : 18401+7758
TDT 985

23' : 18438+7750
LOC 385

35' : 18344+7708
LOC 369

37' : 18271+7726
CVR 869

43' : 18437+7704
TDT1021

44' : 18237+7741
LOC 368

48' : 18420+7656
LOC 384

50' : 18340+7830
TDT 937

64' : 18538+7708
LOC 387

65' : 18225+7659
HU 930

71' : 18554+7824
LDS1896

78' : 18539+7840
LDS1895

79' : 18408+7624
MLR 214

83' : 18175+7652
LOC 362

85' : 18450+7621
UC 3662AB

88' : 18196+7636
HU 929

98' : 18319+7605
LOC 367

101' : 18241+7913
UC 3571

105' : 18444+7600
LDS1892

113' : 18424+7550
LDS1890

119' : 18395+7940
SKF1085

127' : 18535+7547
STF2452

133' : 18411+7953
SKF1647

139' : 18464+7526
YSC 10

141' : 18500+7957
TDT1077

152' : 18475+8010
UC 3672



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.

18374+7741 STT 363 (HD 173831)

 
 
18h 37m 23.92s +77° 41' 12.4" P.A. 335.00 sep 0.6 mag 7.52,8.10 Sp F0IV dist. 110.25 pc (359.64 l.y.)
 
 
Coord 2000 18374+7741 Discov num STT 363 Comp Coord arcsec 2000 18 37 23.92 +77 41 12.4
Date first 1843 Date last 2018 Obs 71
Pa first 18 Pa last 335.1 P.A. Now (θ) 335.1°
Sep first 0.6 Sep last 0.555 Sep. Now (ρ) 0.555"
Mag pri 7.52 Mag sec 8.10 delta mag (ΔM) 0.58 Spectral class F0IV (yellow-white)
Pri motion ra +013 Sec motion ra
Pri motion dec +023 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173831 Constellation Draco SAO 9199 HIP 91298
Tycho2 4574-01312-1 HD 173831 GC 25585 ADS 11584
BD BD+77 702 Distance 110.25 Distance ly 359.64
 
 
ORBITAL ELEMENTS
 
 
Period (P)641.9y± 506 Periastron (T)1987.038y± 0.72 Semi-major axis (a)0.95a± 0.244
Eccentricity (e)0.89± 0.057 Inclination (i)78.3°± 1.7 Longitude of periastron (ω)55.9°± 4.8
Node (Ω)159.7°± 1.5 Notes ReferenceSca2009a
Equinox2000 Last observation2006 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 337.5 0.298
2001 337.9 0.317
2002 338.4 0.334
2003 338.8 0.351
2004 339.1 0.368
2005 339.5 0.383
2006 339.8 0.398
2007 340.1 0.413
2008 340.3 0.427
2009 340.6 0.441
2010 340.8 0.454
2011 341.0 0.467
2012 341.2 0.480
2013 341.4 0.492
2014 341.6 0.504
2015 341.8 0.516
2016 342.0 0.527
2017 342.2 0.538
2018 342.3 0.549
2019 342.5 0.559
2020 342.6 0.569
2021 342.8 0.579
2022 342.9 0.589
2023 343.0 0.599
2024 343.1 0.608
2025 343.3 0.618
2026 343.4 0.627
2027 343.5 0.635
2028 343.6 0.644
2029 343.7 0.653
2030 343.8 0.661


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


 
  


wds18374%2B7741c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18374+7741 STT 363 (HD 173831) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Sca2009a S j Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., & Sala, M. 2009AN....330...55S
Sca2009a +orb AN 330, 55, 2009
 
 
DISCOVERER
 
 
idgroup discov author
1 STT Struve, O.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18374+7741 STT 363 2006 64 341 0.4 7.52 8.10 F0IV NO 183723.92+774112.4
18374+7741 STT 363 2009 67 340 0.5 7.52 8.10 F0IV NO 183723.92+774112.4
18374+7741 STT 363 2011 70 338 0.5 7.52 8.10 F0IV NO 183723.92+774112.4
18374+7741 STT 363 2014 70 340 0.5 7.52 8.10 F0IV O 183723.92+774112.4
18374+7741 STT 363 2018 71 336 0.6 7.52 8.10 F0IV O 183723.92+774112.4

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

 
 
WDS 18374+7741 STT 363 (HD 173831) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18374+7741 STT 363 (HD 173831) : MEASURES
 
 
No records found.

 
 
WDS 18374+7741 (HD 173831) : VIRTUAL EYEPIECE
 
 

18374+7741 STT 363A mag 7.52 Sp F0IV 18374+7741 STT 363B sep 0.5 P.A. 354.30 mag 8.1 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 18374+7741 (HD 173831) : ALADIN DSS IMAGE @ 18h 37m 23.92s +77° 41' 12.4"
 
 
 
 
WDS 18374+7741 STT 363 (HD 173831) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18374+7741 STT 363 distance=0' 18401+7758 TDT 985 distance=19' 18438+7750 LOC 385 distance=23' 18344+7708 LOC 369 distance=35' 18271+7726 CVR 869 distance=37' 18437+7704 TDT1021 distance=43' 18237+7741 LOC 368 distance=44' 18420+7656 LOC 384 distance=48' 18340+7830 TDT 937 distance=50' 18538+7708 LOC 387 distance=64' 18225+7659 HU 930 distance=65' 18554+7824 LDS1896 distance=71' 18539+7840 LDS1895 distance=78' 18408+7624 MLR 214 distance=79' 18175+7652 LOC 362 distance=83' 18450+7621 MLR 216Aa,Ab distance=85' 18450+7621 UC 3662AB distance=85' 18196+7636 HU 929 distance=88' 18319+7605 LOC 367 distance=98' 18241+7913 UC 3571 distance=101' 18444+7600 LDS1892 distance=105' 18424+7550 LDS1890 distance=113' 18395+7940 SKF1085 distance=119' 18535+7547 STF2452 distance=127' 18411+7953 SKF1647 distance=133' 18464+7526 YSC 10 distance=139' 18500+7957 TDT1077 distance=141' 18475+8010 UC 3672 distance=152' 18397+7455 LDS1889 distance=168' 18252+8028 BVD 128 distance=171' 18187+7447 KPP 695 distance=187' 18566+8042 LDS1897 distance=190' 18384+8107 TDT 969 distance=206' 18227+7421 TDT 824 distance=207' 18371+7409 TDT 960 distance=213' 18247+8123 LOC 372 distance=225' 18445+8133 LOC 389 distance=233' 18273+7344 KPP1362 distance=241' 18329+8148 LOC 374 distance=247' 18208+8158 LDS1885 distance=260' 18480+8203 LOC 391 distance=264' 18275+7316 TOI2253 distance=268' 18349+8223 OCA 3 distance=282' 18362+8224 MLR 213 distance=283' 18302+8224 OCA 2 distance=283' 18438+8228 LOC 393 distance=288' 18293+8235 MLR 212 distance=295' 18270+8235 LOC 377 distance=295' 18324+7245 CRB 205 distance=297' 18427+8239 LDS1893 distance=300' 18211+7244 BUP 182BC distance=301' 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 18374+7741 STT 363 335 0.6
Show 18401+7758 TDT 985 26 0.7 19
Show 18438+7750 LOC 385 321 3.2 23
Show 18344+7708 LOC 369 297 23.5 35
Show 18271+7726 CVR 869 195 15.6 37
Show 18437+7704 TDT1021 139 0.7 43
Show 18237+7741 LOC 368 262 8.5 44
Show 18420+7656 LOC 384 260 1.2 48
Show 18340+7830 TDT 937 154 1.6 50
Show 18538+7708 LOC 387 310 8.5 64
Show 18225+7659 HU 930 310 1.0 65
Show 18554+7824 LDS1896 133 6.0 71
Show 18539+7840 LDS1895 45 33.3 78
Show 18408+7624 MLR 214 30 0.4 79
Show 18175+7652 LOC 362 289 7.1 83
Show 18450+7621 MLR 216 Aa,Ab 35 0.4 85
Show 18450+7621 UC 3662 AB 104 58.6 85
Show 18196+7636 HU 929 111 1.8 88
Show 18319+7605 LOC 367 137 1.1 98
Show 18241+7913 UC 3571 73 46.1 101
Show 18444+7600 LDS1892 31 21.6 105
Show 18424+7550 LDS1890 70 58.1 113
Show 18395+7940 SKF1085 110 1.5 119
Show 18535+7547 STF2452 217 5.7 127
Show 18411+7953 SKF1647 343 9.9 133
Show 18464+7526 YSC 10 331 0.3 139
Show 18500+7957 TDT1077 34 2.0 141
Show 18475+8010 UC 3672 260 49.2 152
Show 18397+7455 LDS1889 340 3.9 168
Show 18252+8028 BVD 128 317 24.7 171
Show 18187+7447 KPP 695 11 6.2 187
Show 18566+8042 LDS1897 115 11.7 190
Show 18384+8107 TDT 969 31 1.5 206
Show 18227+7421 TDT 824 275 1.2 207
Show 18371+7409 TDT 960 220 2.0 213
Show 18247+8123 LOC 372 63 22.1 225
Show 18445+8133 LOC 389 160 1.6 233
Show 18273+7344 KPP1362 123 10.3 241
Show 18329+8148 LOC 374 287 5.7 247
Show 18208+8158 LDS1885 141 10.7 260
Show 18480+8203 LOC 391 352 36.7 264
Show 18275+7316 TOI2253 291 26.3 268
Show 18349+8223 OCA 3 145 4.7 282
Show 18362+8224 MLR 213 342 1.6 283
Show 18302+8224 OCA 2 341 3.3 283
Show 18438+8228 LOC 393 23 1.9 288
Show 18293+8235 MLR 212 15 1.5 295
Show 18270+8235 LOC 377 149 4.9 295
Show 18324+7245 CRB 205 208 12.5 297
Show 18427+8239 LDS1893 310 9.9 300
Show 18211+7244 BUP 182 BC 303 9.1 301

 
 
WDS 18374+7741 : COMPONENTS
 
 
  A
B pa=354.3°
sep=0.51"
 
 
18374+7741 A
 
 
Componente originario normalizzato AB Name HD 173831 Coord arcsec 2000 183723.92+774112.4 Mag 7.52
Spectral class F0IV (yellow-white) PmRA 13.00 PmDE 23.0 SAO 9199
HIP 91298 Tycho2 4574-01312-1 HD 173831 GC 25585
BD BD+77 702
Tycho2
Tycho2 4574-01312-1 Pflag RAmdeg 279.34978517 DEmdeg 77.68682273
PmRA 11.2 PmDE 21.1 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.1 EpRAm 1991.36 EpDEm 1991.36
Num 12 Q RAmdeg 1.0 Q DEmdeg 0.8 Q pmRA 1.1
Q pmDE 0.8 BTmag 7.341 E BTmag 0.015 VTmag 6.985
E VTmag 0.010 Prox 999 TYC T HIP 91298
CCDM AS RAdeg 279.34966333 DEdeg 77.68677333 EpRA 1990 1.63
EpDE 1990 1.59 E RAdeg 4.1 E DEdeg 4.0 Posflg P
Corr 0.0
SAO
SAO 9199 DelFlag RA1950 PmRA1950 0.0054
DE1950 PmDE1950 0.014 Vmag 6.9 SpType F0
Double code Source 70 CatNum 25585 DM BD+77 702
DMcomp BDsup HD 173831 M HD 0
GC 25585 RA1950rad 4.88629179 DE1950rad 1.35506877 PmRA2000 0.0069
PmDE2000 0.014
Hipparcos
Catalog H HIP 91298 Proxy H RAhms 18 37 23.92
DEdms +77 41 12.4 Vmag 6.94 VarFlag R Vmag G
RAdeg 279.35 DEdeg 77.6868 AstroRef * Plx 7.94
CCDM 18374+7741 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AS
Theta 317 Rho 0.14 HD 173831 BD BD+77 702
CD CP Dm number +77 702 VIred 0.42
SpType F0 R SpType Coord arcsec 2000 183723.92+774112.4
Hipparcos 2
HIP 91298 Sn 55 So 3 Nc 2
RArad 4.8755712473 DErad 1.3558899645 Plx 9.07 PmRA 10.25
PmDE 18.57 E RArad 0.4 E DErad 0.38 E Plx 0.41
E pmRA 0.43 E pmDE 0.49 Hpmag 7.0231 E Hpmag 0.0006
SHp 0.008 VA 0 BV 0.363 E BV 0.015
VI 0.42
CCDM
Ccdm 18374+7741 RComp Comp A Note1
Note2 Discov num DRAs -0.16 DDEs 12.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.6 Sp F0 PmNote *
PmRA 1 PmDE 16 Dm number +77 702 Cat1 BD
Name2 +77 524 Cat2 AGK2/3 HD 173831 M HD
ADS BDS A11584 M ADS BDS N IDS IDS 18423N7735A
HIC 91298
 
 
18374+7741 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 183723.90+774112.9 Mag 8.1 Calc delta mag 0.58
Calc coord yes
CCDM
Ccdm 18374+7741 RComp Comp B Note1 *
Note2 Discov num STT 363 DRAs DDEs
R dRAs Year 1960 Theta 128 Rho 0.2
Obs 14 Vmag 7.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11584 M ADS BDS N IDS IDS 18423N7735B
HIC 91298