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Doubles in session


Current system
18396+4056
COU 1607
HD 172671


Nearby doubles
7' : 18401+4100
SLE 93

16' : 18389+4042
A 586

18' : 18390+4113
BRT1919

21' : 18413+4102
SLE 94

22' : 18397+4035
AG 225AB

31' : 18404+4028
SLE 92

44' : 18362+4117
STF2351

47' : 18379+4014
ES 1655

53' : 18349+4053
J 764

59' : 18380+4151
UC 3630

59' : 18348+4036
TDT 942

60' : 18365+4008
SLE 95

60' : 18436+4020
SLE 122

62' : 18418+4001
LSC 83

62' : 18397+3955
TDT 981

62' : 18370+4001
WSP 153AB

63' : 18352+4135
TOK 322AB

63' : 18450+4051
COU1792

63' : 18342+4039
ES 1654

68' : 18340+4121
ARY 14AB

70' : 18409+4204
SLW1220

79' : 18462+4118
ES 1656

82' : 18466+4042
HDS2663

83' : 18381+3935
BU 50AB

84' : 18346+4158
UC 3615

84' : 18453+4005
ROE 50AB



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.

18396+4056 COU 1607 (HD 172671)

 
 
18h 39m 33.03s +40° 56' 06.2" P.A. 136.00 sep 0.0 mag 6.47,7.99 Sp B9V dist. 271.74 pc (886.42 l.y.)
 
 
Coord 2000 18396+4056 Discov num COU1607 Comp Coord arcsec 2000 18 39 33.03 +40 56 06.2
Date first 1978 Date last 2014 Obs 38
Pa first 96 Pa last 136.2 P.A. Now (θ) 136.2°
Sep first 0.1 Sep last 0.014 Sep. Now (ρ) 0.014"
Mag pri 6.47 Mag sec 7.99 delta mag (ΔM) 1.52 Spectral class B9V (blue-white)
Pri motion ra +015 Sec motion ra
Pri motion dec +003 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 172671 Constellation Lyra SAO 47676 HIP 91491
Tycho2 3109-00722-1 Gaia DR2 2110533322798008192 HD 172671 HR 7017
GC 25541 BD BD+40 3446 Distance 271.74 Distance ly 886.42
 
 
ORBITAL ELEMENTS
 
 
Period (P)69.4y± 12.5 Periastron (T)2021.1y± 2.5 Semi-major axis (a)0.112a± 0.012
Eccentricity (e)0.602± 0.161 Inclination (i)87.1°± 0.7 Longitude of periastron (ω)184.6°± 15.3
Node (Ω)114.9°± 0.6 Notes ReferenceBAE2021
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 116.5 0.140
2001 116.6 0.134
2002 116.8 0.128
2003 116.9 0.122
2004 117.1 0.115
2005 117.3 0.108
2006 117.6 0.100
2007 117.9 0.092
2008 118.2 0.083
2009 118.6 0.074
2010 119.2 0.064
2011 119.9 0.054
2012 121.1 0.043
2013 122.9 0.032
2014 126.8 0.021
2015 139.9 0.010
2016 247.4 0.005
2017 283.1 0.016
2018 289.3 0.027
2019 292.0 0.036
2020 293.7 0.043
2021 295.0 0.045
2022 296.4 0.041
2023 298.4 0.032
2024 302.3 0.021
2025 317.7 0.008
2026 82.4 0.007
2027 103.2 0.019
2028 107.5 0.032
2029 109.4 0.044
2030 110.5 0.055


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


 
  


wds18396%2B4056a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18396+4056 COU 1607 (HD 172671) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
BAE2021 orb j Baidin, A.E. & Krechet, V.G. 2021AstBu..76...84B
BAE2021 Astrophys. Bull. 76, 84, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 COU Couteau, P.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18396+4056 COU1607 1995 36 116 0.2 6.47 7.99 B9V D 183933.03+405606.2
18396+4056 COU1607 2014 38 136 0.0 6.47 7.99 B9V 183933.03+405606.2

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

 
 
WDS 18396+4056 COU 1607 (HD 172671) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18396+4056 COU 1607 (HD 172671) : MEASURES
 
 
No records found.

 
 
WDS 18396+4056 (HD 172671) : VIRTUAL EYEPIECE
 
 

18396+4056 COU1607A mag 6.47 Sp B9V 18396+4056 COU1607B mag 7.99 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 18396+4056 (HD 172671) : ALADIN DSS IMAGE @ 18h 39m 33.03s +40° 56' 06.2"
 
 
 
 
WDS 18396+4056 COU 1607 (HD 172671) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18396+4056 COU1607 distance=0' 18401+4100 SLE 93 distance=7' 18389+4042 A 586 distance=16' 18390+4113 BRT1919 distance=18' 18413+4102 SLE 94 distance=21' 18397+4035 AG 225AB distance=22' 18397+4035 AG 225AC distance=22' 18397+4035 FYM 35AD distance=22' 18404+4028 SLE 92 distance=31' 18362+4117 STF2351 distance=44' 18379+4014 ES 1655 distance=47' 18352+4135 RAO 83Ba,Bb distance=53' 18349+4053 J 764 distance=53' 18380+4151 UC 3630 distance=59' 18348+4036 TDT 942 distance=59' 18365+4008 SLE 95 distance=60' 18436+4020 SLE 122 distance=60' 18418+4001 LSC 83 distance=62' 18397+3955 TDT 981 distance=62' 18370+4001 WSP 153AB distance=62' 18352+4135 TOK 322AB distance=63' 18450+4051 COU1792 distance=63' 18342+4039 ES 1654 distance=63' 18340+4121 ARY 14AB distance=68' 18340+4121 ARY 14AC distance=68' 18409+4204 SLW1220 distance=70' 18462+4118 ES 1656 distance=79' 18466+4042 HDS2663 distance=82' 18381+3935 BU 50CD distance=82' 18381+3935 BU 50AB distance=83' 18381+3935 BU 50AC distance=83' 18381+3935 BU 50AD distance=83' 18346+4158 UC 3615 distance=84' 18453+4005 ROE 50AB distance=84' 18453+4005 ROE 50AC distance=84' 18453+4005 ROE 50AD distance=84' 18453+4005 ROE 50AE distance=84' 18453+4005 BKO 53AG distance=84' 18453+4005 BKO 53AH distance=84' 18453+4005 ROE 50AF distance=84' 18453+4005 ROE 50CF distance=84' 18332+4010 STT 356AB distance=86' 18332+4010 STT 356AC distance=86' 18332+4010 STT 356BC distance=86' 18426+3937 HJ 1341 distance=87' 18466+4134 TOI2138 distance=89' 18319+4119 COU1605 distance=90' 18443+3940 STFA 37BC distance=94' 18443+3940 STFA 37BD distance=94' 18443+3940 STFA 37BI distance=94' 18443+3940 STF2382AB distance=94' 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 18396+4056 COU1607 136 0.0
Show 18401+4100 SLE 93 68 11.5 7
Show 18389+4042 A 586 203 2.2 16
Show 18390+4113 BRT1919 327 3.8 18
Show 18413+4102 SLE 94 103 15.9 21
Show 18397+4035 AG 225 AB 354 6.6 22
Show 18397+4035 AG 225 AC 236 12.6 22
Show 18397+4035 FYM 35 AD 276 29.8 22
Show 18404+4028 SLE 92 99 15.9 31
Show 18362+4117 STF2351 160 5.0 44
Show 18379+4014 ES 1655 28 2.0 47
Show 18352+4135 RAO 83 Ba,Bb 263 0.1 53
Show 18349+4053 J 764 201 2.8 53
Show 18380+4151 UC 3630 118 11.9 59
Show 18348+4036 TDT 942 185 2.0 59
Show 18365+4008 SLE 95 112 10.9 60
Show 18436+4020 SLE 122 151 17.9 60
Show 18418+4001 LSC 83 266 0.1 62
Show 18397+3955 TDT 981 129 0.5 62
Show 18370+4001 WSP 153 AB 287 2.8 62
Show 18352+4135 TOK 322 AB 116 621.2 63
Show 18450+4051 COU1792 347 1.1 63
Show 18342+4039 ES 1654 256 3.3 63
Show 18340+4121 ARY 14 AB 293 38.5 68
Show 18340+4121 ARY 14 AC 356 119.1 68
Show 18409+4204 SLW1220 113 17.4 70
Show 18462+4118 ES 1656 252 5.2 79
Show 18466+4042 HDS2663 65 0.2 82
Show 18381+3935 BU 50 CD 165 6.5 82
Show 18381+3935 BU 50 AB 3 22.2 83
Show 18381+3935 BU 50 AC 328 74.3 83
Show 18381+3935 BU 50 AD 327 68.1 83
Show 18346+4158 UC 3615 181 49.6 84
Show 18453+4005 ROE 50 AB 282 4.7 84
Show 18453+4005 ROE 50 AC 120 26.2 84
Show 18453+4005 ROE 50 AD 253 96.6 84
Show 18453+4005 ROE 50 AE 196 93.6 84
Show 18453+4005 BKO 53 AG 156 51.7 84
Show 18453+4005 BKO 53 AH 301 35.7 84
Show 18453+4005 ROE 50 AF 114 35.7 84
Show 18453+4005 ROE 50 CF 99 9.9 84
Show 18332+4010 STT 356 AB 302 28.3 86
Show 18332+4010 STT 356 AC 9 48.1 86
Show 18332+4010 STT 356 BC 45 45.6 86
Show 18426+3937 HJ 1341 285 8.8 87
Show 18466+4134 TOI2138 215 0.2 89
Show 18319+4119 COU1605 310 1.0 90
Show 18443+3940 STFA 37 BC 172 210.9 94
Show 18443+3940 STFA 37 BD 171 212.5 94
Show 18443+3940 STFA 37 BI 137 151.3 94
Show 18443+3940 STF2382 AB 345 2.2 94

 
 
WDS 18396+4056 : COMPONENTS
 
 
  A
B pa=144.1°
sep=0.01"
 
 
18396+4056 A
 
 
Componente originario normalizzato AB Name HD 172671 Coord arcsec 2000 183933.03+405606.2 Mag 6.47
Spectral class B9V (blue-white) PmRA 15.00 PmDE 3.0 SAO 47676
HIP 91491 Tycho2 3109-00722-1 HD 172671 HR 7017
GC 25541 BD BD+40 3446
Tycho2
Tycho2 3109-00722-1 Pflag RAmdeg 279.88765657 DEmdeg 40.93506258
PmRA 14.6 PmDE 0.1 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.34 EpDEm 1991.38
Num 9 Q RAmdeg 1.5 Q DEmdeg 0.5 Q pmRA 1.5
Q pmDE 0.6 BTmag 6.166 E BTmag 0.014 VTmag 6.221
E VTmag 0.010 Prox 999 TYC T HIP 91491
CCDM AB RAdeg 279.88761139 DEdeg 40.93506222 EpRA 1990 1.58
EpDE 1990 1.61 E RAdeg 3.6 E DEdeg 3.5 Posflg P
Corr 0.0
SAO
SAO 47676 DelFlag RA1950 PmRA1950 0.002
DE1950 PmDE1950 -0.002 Vmag 6.1 SpType A0
Double code Source 70 CatNum 25541 DM BD+40 3446
DMcomp BDsup HD 172671 M HD 0
GC 25541 RA1950rad 4.87792684 DE1950rad 0.71363246 PmRA2000 0.0024
PmDE2000 -0.002
Hipparcos
Catalog H HIP 91491 Proxy H RAhms 18 39 33.03
DEdms +40 56 06.2 Vmag 6.25 VarFlag R Vmag G
RAdeg 279.888 DEdeg 40.9351 AstroRef * Plx 4.04
CCDM 18396+4056 N CCDM M Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 118 Rho 0.171 HD 172671 BD BD+40 3446
CD CP Dm number +40 3446 VIred -0.03
SpType B9V R SpType Coord arcsec 2000 183933.03+405606.2
Hipparcos 2
HIP 91491 Sn 55 So 3 Nc 2
RArad 4.8849602796 DErad 0.7144516109 Plx 3.68 PmRA 13.92
PmDE -0.72 E RArad 0.31 E DErad 0.41 E Plx 0.4
E pmRA 0.35 E pmDE 0.55 Hpmag 6.226 E Hpmag 0.0006
SHp 0.006 VA 0 BV -0.052 E BV 0.008
VI -0.03
CCDM
Ccdm 18396+4056 RComp Comp A Note1
Note2 Discov num DRAs -2.97 DDEs 5.8
R dRAs 81 Year Theta Rho
Obs 2 Vmag 6.5 Sp A0 PmNote @
PmRA 15 PmDE -9 Dm number +40 3446 Cat1 BD
Name2 +40 1719 Cat2 AGK2/3 HD 172671 M HD
ADS BDS M ADS BDS N IDS IDS 18363N4051A
HIC 91491
 
 
18396+4056 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 183933.03+405606.2 Mag 7.99 Calc delta mag 1.52
Calc coord yes
CCDM
Ccdm 18396+4056 RComp Comp B Note1
Note2 Discov num COU1607 DRAs DDEs
R dRAs Year 1978 Theta 115 Rho 0.2
Obs 23 Vmag 6.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 18363N4051B
HIC 91491