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Current system
18075+1940
STT 524
HD 165886


Nearby doubles
26' : 18088+1923
TDT 707

37' : 18066+2014
J 1132

45' : 18051+1912
KPP1682

52' : 18104+1910
KPP2480

64' : 18086+1838
HU 314

67' : 18122+1935
BRT2443

68' : 18101+1844
GWP2766

72' : 18088+2049
AGC 8

84' : 18074+1817
BPM 725

84' : 18134+1941
GWP2769

85' : 18016+1953
RAO 383

93' : 18097+2107
COU 117

93' : 18103+1817
HU 316

95' : 18085+2113
TDT 703

99' : 18144+1953
HDS2576

99' : 18140+2017
HO 268

99' : 18131+1841
CBL 167

100' : 18089+1802
BPM 729

101' : 18024+2050
TOK 56

101' : 18140+1901
HEI 801

103' : 18096+1801
BRT2441

106' : 18022+2055
LOC 2

109' : 18022+2058
BUP 178AB

110' : 18058+2127
STT 341AB

113' : 18154+1946
STT 346

113' : 18050+2127
STT 534



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.

18075+1940 STT 524 (HD 165886)

 
 
18h 07m 29.52s +19° 39' 59.1" P.A. 206.00 sep 0.5 mag 7.89,8.87 Sp A3V dist. 225.73 pc (736.33 l.y.)
 
 
Coord 2000 18075+1940 Discov num STT 524 Comp Coord arcsec 2000 18 07 29.52 +19 39 59.1
Date first 1853 Date last 2018 Obs 74
Pa first 85 Pa last 205.8 P.A. Now (θ) 205.8°
Sep first 0.3 Sep last 0.471 Sep. Now (ρ) 0.471"
Mag pri 7.89 Mag sec 8.87 delta mag (ΔM) 0.98 Spectral class A3V (white)
Pri motion ra +006 Sec motion ra
Pri motion dec +000 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 165886 Constellation Hercules SAO 103403 HIP 88791
Tycho2 1562-01105-1 Gaia DR2 4527485044312091392 HD 165886 ADS 11080
BD BD+19 3533 Distance 225.73 Distance ly 736.33
 
 
ORBITAL ELEMENTS
 
 
Period (P)686y Periastron (T)1946.3y Semi-major axis (a)0.584a
Eccentricity (e)0.672 Inclination (i)129.7° Longitude of periastron (ω)57.8°
Node (Ω)24.2° Notes ReferenceHrt2000c
Equinox2000 Last observation1997 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 213.7 0.394
2001 213.2 0.399
2002 212.7 0.404
2003 212.1 0.409
2004 211.6 0.415
2005 211.2 0.420
2006 210.7 0.425
2007 210.2 0.430
2008 209.8 0.435
2009 209.3 0.440
2010 208.9 0.444
2011 208.5 0.449
2012 208.1 0.454
2013 207.6 0.458
2014 207.2 0.463
2015 206.9 0.467
2016 206.5 0.472
2017 206.1 0.476
2018 205.7 0.481
2019 205.4 0.485
2020 205.0 0.489
2021 204.7 0.493
2022 204.3 0.498
2023 204.0 0.502
2024 203.6 0.506
2025 203.3 0.510
2026 203.0 0.514
2027 202.7 0.518
2028 202.4 0.521
2029 202.0 0.525
2030 201.7 0.529


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


 
  


wds18075%2B1940a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18075+1940 STT 524 (HD 165886) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Hrt2000c orb - Hartkopf, W.I. & Mason, B.D. 2000IAUDS.142....1H
Hrt2000c Inf. Circ. 142, 1, 2000
 
 
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
18075+1940 STT 524 2004 67 210 0.4 7.89 8.87 A3V NOD 180729.52+193959.1
18075+1940 STT 524 2007 68 210 0.4 7.89 8.87 A3V NOD 180729.52+193959.1
18075+1940 STT 524 2009 70 210 0.4 7.89 8.87 A3V NOD 180729.52+193959.1
18075+1940 STT 524 2018 72 207 0.5 7.89 8.87 A3V O 180729.52+193959.1

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

 
 
WDS 18075+1940 STT 524 (HD 165886) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18075+1940 STT 524 (HD 165886) : MEASURES
 
 
No records found.

 
 
WDS 18075+1940 (HD 165886) : VIRTUAL EYEPIECE
 
 

18075+1940 STT 524A mag 7.89 Sp A3V 18075+1940 STT 524B sep 0.5 P.A. 204.50 mag 8.87 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 18075+1940 (HD 165886) : ALADIN DSS IMAGE @ 18h 07m 29.52s +19° 39' 59.1"
 
 
 
 
WDS 18075+1940 STT 524 (HD 165886) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18075+1940 STT 524 distance=0' 18088+1923 TDT 707 distance=26' 18066+2014 J 1132 distance=37' 18051+1912 KPP1682 distance=45' 18104+1910 KPP2480 distance=52' 18086+1838 HU 314 distance=64' 18122+1935 BRT2443 distance=67' 18101+1844 GWP2766 distance=68' 18088+2049 AGC 8 distance=72' 18074+1817 BPM 725 distance=84' 18134+1941 GWP2769 distance=84' 18016+1953 RAO 383 distance=85' 18097+2107 COU 117 distance=93' 18103+1817 HU 316 distance=93' 18085+2113 TDT 703 distance=95' 18144+1953 HDS2576 distance=99' 18140+2017 HO 268 distance=99' 18131+1841 CBL 167 distance=99' 18089+1802 BPM 729 distance=100' 18024+2050 TOK 56 distance=101' 18140+1901 HEI 801 distance=101' 18096+1801 BRT2441 distance=103' 18022+2055 LOC 2 distance=106' 18022+2058 BUP 178AB distance=109' 18022+2058 BUP 178AC distance=109' 18058+2127 STT 341AB distance=110' 18058+2127 STT 341AB,E distance=110' 18058+2127 STT 341AB,F distance=110' 18058+2127 STT 341AB,G distance=110' 18058+2127 MET 82AH distance=110' 18058+2127 MET 82AI distance=110' 18058+2127 MET 82AJ distance=110' 18058+2127 STT 341AB,C distance=110' 18058+2127 STT 341AB,D distance=110' 18154+1946 STT 346 distance=113' 18050+2127 STT 534 distance=113' 18099+2128 LAW 6 distance=114' 18103+2128 HEI9002A,BC distance=115' 18103+2128 BRT2442BC distance=115' 18153+2012 J 2124 distance=116' 17595+2009 UC 3465 distance=117' 18154+1850 TDT 761 distance=123' 18155+2030 RAO 385 distance=124' 18014+1811 GWP2756 distance=124' 18024+1758 BPM 717 distance=126' 18052+1739 KPP4082 distance=126' 18133+2118 TDT 743 distance=128' 18163+2016 HO 269 distance=131' 18019+1754 LEP 156 distance=132' 18166+2022 KPP3329 distance=135' 18004+2112 A 1375 distance=136' 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 18075+1940 STT 524 206 0.5
Show 18088+1923 TDT 707 67 0.6 26
Show 18066+2014 J 1132 140 3.2 37
Show 18051+1912 KPP1682 17 13.0 45
Show 18104+1910 KPP2480 153 22.2 52
Show 18086+1838 HU 314 71 0.3 64
Show 18122+1935 BRT2443 117 6.3 67
Show 18101+1844 GWP2766 205 9.6 68
Show 18088+2049 AGC 8 136 23.5 72
Show 18074+1817 BPM 725 278 17.0 84
Show 18134+1941 GWP2769 117 92.1 84
Show 18016+1953 RAO 383 223 0.6 85
Show 18097+2107 COU 117 49 2.4 93
Show 18103+1817 HU 316 157 1.8 93
Show 18085+2113 TDT 703 176 0.7 95
Show 18144+1953 HDS2576 68 1.0 99
Show 18140+2017 HO 268 180 1.0 99
Show 18131+1841 CBL 167 260 34.3 99
Show 18089+1802 BPM 729 92 23.4 100
Show 18024+2050 TOK 56 335 0.1 101
Show 18140+1901 HEI 801 173 2.4 101
Show 18096+1801 BRT2441 26 4.8 103
Show 18022+2055 LOC 2 13 14.4 106
Show 18022+2058 BUP 178 AB 282 146.7 109
Show 18022+2058 BUP 178 AC 155 145.9 109
Show 18058+2127 STT 341 AB 89 0.3 110
Show 18058+2127 STT 341 AB,E 38 66.5 110
Show 18058+2127 STT 341 AB,F 357 111.6 110
Show 18058+2127 STT 341 AB,G 239 132.5 110
Show 18058+2127 MET 82 AH 63 2.6 110
Show 18058+2127 MET 82 AI 111 6.5 110
Show 18058+2127 MET 82 AJ 34 13.1 110
Show 18058+2127 STT 341 AB,C 171 28.2 110
Show 18058+2127 STT 341 AB,D 99 39.5 110
Show 18154+1946 STT 346 329 5.3 113
Show 18050+2127 STT 534 269 2.3 113
Show 18099+2128 LAW 6 267 1.1 114
Show 18103+2128 HEI9002 A,BC 59 14.4 115
Show 18103+2128 BRT2442 BC 74 3.9 115
Show 18153+2012 J 2124 348 3.9 116
Show 17595+2009 UC 3465 90 51.0 117
Show 18154+1850 TDT 761 129 0.5 123
Show 18155+2030 RAO 385 87 0.8 124
Show 18014+1811 GWP2756 318 261.9 124
Show 18024+1758 BPM 717 250 115.6 126
Show 18052+1739 KPP4082 45 31.7 126
Show 18133+2118 TDT 743 68 1.0 128
Show 18163+2016 HO 269 152 8.9 131
Show 18019+1754 LEP 156 92 5.0 132
Show 18166+2022 KPP3329 203 1.5 135
Show 18004+2112 A 1375 92 1.8 136

 
 
WDS 18075+1940 : COMPONENTS
 
 
  A
B pa=204.5°
sep=0.47"
 
 
18075+1940 A
 
 
Componente originario normalizzato AB Name HD 165886 Coord arcsec 2000 180729.52+193959.1 Mag 7.89
Spectral class A3V (white) PmRA 6.00 PmDE 0.0 SAO 103403
HIP 88791 Tycho2 1562-01105-1 HD 165886 BD BD+19 3533
Tycho2
Tycho2 1562-01105-1 Pflag RAmdeg 271.87298448 DEmdeg 19.66640292
PmRA 5.5 PmDE 0.9 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.1 EpRAm 1991.34 EpDEm 1991.37
Num 13 Q RAmdeg 1.0 Q DEmdeg 1.2 Q pmRA 1.0
Q pmDE 1.2 BTmag 7.673 E BTmag 0.015 VTmag 7.493
E VTmag 0.011 Prox 999 TYC T HIP 88791
CCDM AB RAdeg 271.87297083 DEdeg 19.66640083 EpRA 1990 1.64
EpDE 1990 1.63 E RAdeg 4.3 E DEdeg 4.3 Posflg P
Corr -0.1
SAO
SAO 103403 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 0.017 Vmag 7.5 SpType A2
Double code Source 28 CatNum 6614 DM BD+19 3533
DMcomp BDsup HD 165886 M HD 0
GC RA1950rad 4.73562911 DE1950rad 0.34310976 PmRA2000 0.0005
PmDE2000 0.018
Hipparcos
Catalog H HIP 88791 Proxy H RAhms 18 07 29.52
DEdms +19 39 59.1 Vmag 7.46 VarFlag R Vmag H
RAdeg 271.873 DEdeg 19.6664 AstroRef A Plx 5.24
CCDM 18075+1940 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 218 Rho 0.345 HD 165886 BD BD+19 3533
CD CP Dm number +19 3533 VIred 0.15
SpType A2 R SpType Coord arcsec 2000 180729.52+193959.1
Hipparcos 2
HIP 88791 Sn 15 So 3 Nc 2
RArad 4.7450787584 DErad 0.3432437732 Plx 4.43 PmRA 3.39
PmDE 1.06 E RArad 0.53 E DErad 0.6 E Plx 0.8
E pmRA 0.52 E pmDE 0.75 Hpmag 7.5169 E Hpmag 0.0015
SHp 0.012 VA 0 BV 0.169 E BV 0.009
VI 0.18
CCDM
Ccdm 18075+1940 RComp Comp A Note1
Note2 Discov num DRAs -0.48 DDEs -1.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.7 Sp A2 PmNote *
PmRA 6 PmDE -8 Dm number +19 3533 Cat1 BD
Name2 +19 1698 Cat2 AGK2/3 HD 165886 M HD
ADS BDS A11080 M ADS BDS N IDS IDS 18032N1939A
HIC 88791
 
 
18075+1940 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 180729.51+193958.7 Mag 8.87 Calc delta mag 0.98
Calc coord yes
CCDM
Ccdm 18075+1940 RComp Comp B Note1 *
Note2 Discov num STT 524 DRAs DDEs
R dRAs Year 1960 Theta 267 Rho 0.2
Obs 28 Vmag 9.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11080 M ADS BDS N N IDS IDS 18032N1939B
HIC 88791