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Doubles in session


Current system
18084+4407
HDS 2554
HD 166409


Nearby doubles
27' : 18072+4430
BRT1914

29' : 18058+4400
LDS4775

36' : 18064+4437
COU1926

36' : 18097+4334
CVR 868

43' : 18120+4355
ES 1419

50' : 18094+4319
ES 1418

54' : 18092+4314
ES 1417AB

64' : 18025+4414
BU 1127AB

67' : 18030+4442
ES 1416

69' : 18054+4306
COU1787

73' : 18055+4301
TDS 903

74' : 18132+4315
A 576

78' : 18103+4521
LDS4777

79' : 18156+4417
ES 1420AB

86' : 18109+4242
ROE 5AB

86' : 18162+4423
ES 1421

90' : 18022+4506
CBL 73

92' : 18130+4251
ES 473AB

98' : 18173+4355
A 577

99' : 18001+4452
LDS4769

100' : 17593+4422
UC 3463

100' : 18176+4409
RAO 386

101' : 18050+4233
UC 3488

103' : 18015+4517
STF2270

104' : 18178+4351
A 578AB

106' : 18180+4351
UC 3549



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.

18084+4407 HDS 2554 (HD 166409)

 
 
18h 08m 21.80s +44° 06' 45.1" P.A. 205.00 sep 0.1 mag 7.58,7.81 Sp F5 dist. 101.21 pc (330.15 l.y.)
 
 
Coord 2000 18084+4407 Discov num HDS2554 Comp Coord arcsec 2000 18 08 21.80 +44 06 45.1
Date first 1991 Date last 2013 Obs 10
Pa first 25 Pa last 204.7 P.A. Now (θ) 204.7°
Sep first 0.1 Sep last 0.135 Sep. Now (ρ) 0.135"
Mag pri 7.58 Mag sec 7.81 delta mag (ΔM) 0.23 Spectral class F5 (yellow-white)
Pri motion ra +021 Sec motion ra
Pri motion dec +025 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166409 Constellation Hercules SAO 47250 HIP 88852
Tycho2 3114-01636-1 Gaia DR2 2115646434121439616 HD 166409 GC 24749
BD BD+44 2829 Distance 101.21 Distance ly 330.15
 
 
ORBITAL ELEMENTS
 
 
Period (P)21.6y± 0.7 Periastron (T)2001.4y± 0.7 Semi-major axis (a)111.8m± 3.1
Eccentricity (e)0.217± 0.033 Inclination (i)75.3°± 1.7 Longitude of periastron (ω)160°± 12
Node (Ω)208.3°± 1.7 Notes ReferenceHor2011b
Equinox2000 Last observation2008 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 7.5 0.054
2001 19.8 0.076
2002 27.2 0.088
2003 33.9 0.086
2004 42.1 0.072
2005 55.9 0.051
2006 88.3 0.032
2007 144.4 0.033
2008 174.7 0.053
2009 187.4 0.076
2010 194.3 0.097
2011 198.9 0.115
2012 202.4 0.127
2013 205.4 0.133
2014 208.3 0.134
2015 211.3 0.128
2016 214.7 0.116
2017 219.2 0.098
2018 226.3 0.074
2019 241.2 0.047
2020 288.8 0.026
2021 352.4 0.038
2022 13.5 0.064
2023 23.0 0.083
2024 29.9 0.089
2025 36.9 0.081
2026 46.6 0.064
2027 65.4 0.043
2028 110.6 0.029
2029 160.1 0.040
2030 180.9 0.063


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


 
  


wds18084%2B4407a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18084+4407 HDS 2554 (HD 166409) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Hor2011b S j Horch, E.P., van Altena, W.F., Howell, S.B., Sherry, W.H., & Ciardi, D.R. 2011AJ....141..180H
Hor2011b AJ 141, 180, 2011
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18084+4407 HDS2554 2002 2 214 0.1 7.58 7.81 F5 D 180821.80+440645.1
18084+4407 HDS2554 2008 3 180 0.1 7.58 7.81 F5 D 180821.80+440645.1
18084+4407 HDS2554 2012 9 21 0.1 7.58 7.81 F5 D 180821.80+440645.1
18084+4407 HDS2554 2013 10 205 0.1 7.58 7.81 F5 O 180821.80+440645.1

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

 
 
WDS 18084+4407 HDS 2554 (HD 166409) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18084+4407 HDS 2554 (HD 166409) : MEASURES
 
 
No records found.

 
 
WDS 18084+4407 (HD 166409) : VIRTUAL EYEPIECE
 
 

18084+4407 HDS2554A mag 7.58 Sp F5 18084+4407 HDS2554B sep 0.1 P.A. 198.30 mag 7.81 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 18084+4407 (HD 166409) : ALADIN DSS IMAGE @ 18h 08m 21.80s +44° 06' 45.1"
 
 
 
 
WDS 18084+4407 HDS 2554 (HD 166409) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18084+4407 HDS2554 distance=0' 18083+4406 KPP4086CD distance=1' 18072+4430 BRT1914 distance=27' 18058+4400 LDS4775 distance=29' 18064+4437 COU1926 distance=36' 18097+4334 CVR 868 distance=36' 18120+4355 ES 1419 distance=43' 18094+4319 ES 1418 distance=50' 18092+4314 ES 1417AB distance=54' 18092+4314 ES 1417BC distance=54' 18025+4414 OLE 4Aa,Ab distance=64' 18025+4414 BU 1127AB distance=64' 18030+4442 ES 1416 distance=67' 18054+4306 COU1787 distance=69' 18055+4301 TDS 903 distance=73' 18132+4315 A 576 distance=74' 18103+4521 LDS4777 distance=78' 18156+4417 ES 1420AB distance=79' 18156+4417 ES 1420AC distance=79' 18109+4242 ROE 6CD distance=84' 18109+4242 ROE 5AB distance=86' 18109+4242 ROE 5AC distance=86' 18162+4423 ES 1421 distance=86' 18022+4506 CBL 73 distance=90' 18130+4251 ES 473AB distance=92' 18130+4251 SLV 6AC distance=92' 18130+4251 ES 473BC distance=92' 18173+4355 A 577 distance=98' 18001+4452 LDS4769 distance=99' 17593+4422 UC 3463 distance=100' 18176+4409 RAO 386 distance=100' 18050+4233 UC 3488 distance=101' 18015+4517 STF2270 distance=103' 18178+4351 A 578Aa,Ab distance=104' 18178+4351 A 578AB distance=104' 18180+4351 UC 3549 distance=106' 18075+4552 KUI 85 (Nova Hercules) distance=106' 18011+4521 STF3129 distance=108' 17596+4314 COU1784 distance=109' 18093+4555 WFC 205 distance=110' 18181+4334 A 579 distance=111' 18058+4215 KPP2613 distance=115' 18063+4213 ROE 18 distance=116' 18179+4311 KPP4103 distance=118' 18108+4212 TDT 724 distance=119' 18182+4509 HDS2588 distance=123' 17571+4343 KPP 404 distance=125' 18188+4510 WOL 2 distance=129' 18043+4206 COU1786Aa,Ab distance=129' 18043+4206 ROE 1AB distance=129' 18197+4453 ES 2665AB distance=130' 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 18084+4407 HDS2554 205 0.1
Show 18083+4406 KPP4086 CD 236 2.9 1
Show 18072+4430 BRT1914 160 4.1 27
Show 18058+4400 LDS4775 53 15.7 29
Show 18064+4437 COU1926 124 0.3 36
Show 18097+4334 CVR 868 207 28.7 36
Show 18120+4355 ES 1419 320 10.4 43
Show 18094+4319 ES 1418 303 4.3 50
Show 18092+4314 ES 1417 AB 206 13.9 54
Show 18092+4314 ES 1417 BC 277 4.2 54
Show 18025+4414 OLE 4 Aa,Ab 319 0.1 64
Show 18025+4414 BU 1127 AB 39 0.7 64
Show 18030+4442 ES 1416 73 1.5 67
Show 18054+4306 COU1787 325 0.4 69
Show 18055+4301 TDS 903 173 1.1 73
Show 18132+4315 A 576 282 0.4 74
Show 18103+4521 LDS4777 60 56.3 78
Show 18156+4417 ES 1420 AB 66 8.3 79
Show 18156+4417 ES 1420 AC 9 14.6 79
Show 18109+4242 ROE 6 CD 228 11.1 84
Show 18109+4242 ROE 5 AB 115 14.9 86
Show 18109+4242 ROE 5 AC 32 193.5 86
Show 18162+4423 ES 1421 345 11.8 86
Show 18022+4506 CBL 73 293 31.7 90
Show 18130+4251 ES 473 AB 98 30.7 92
Show 18130+4251 SLV 6 AC 129 42.8 92
Show 18130+4251 ES 473 BC 173 22.5 92
Show 18173+4355 A 577 304 0.7 98
Show 18001+4452 LDS4769 312 82.7 99
Show 17593+4422 UC 3463 305 51.0 100
Show 18176+4409 RAO 386 228 0.4 100
Show 18050+4233 UC 3488 313 4.2 101
Show 18015+4517 STF2270 212 6.3 103
Show 18178+4351 A 578 Aa,Ab 244 0.3 104
Show 18178+4351 A 578 AB 167 1.8 104
Show 18180+4351 UC 3549 159 20.7 106
Show Nova Hercules 18075+4552 KUI 85 130 3.1 106
Show 18011+4521 STF3129 168 30.8 108
Show 17596+4314 COU1784 97 2.2 109
Show 18093+4555 WFC 205 50 6.5 110
Show 18181+4334 A 579 340 1.5 111
Show 18058+4215 KPP2613 113 24.0 115
Show 18063+4213 ROE 18 171 14.9 116
Show 18179+4311 KPP4103 295 1.9 118
Show 18108+4212 TDT 724 56 0.5 119
Show 18182+4509 HDS2588 31 0.4 123
Show 17571+4343 KPP 404 293 3.7 125
Show 18188+4510 WOL 2 183 1.3 129
Show 18043+4206 COU1786 Aa,Ab 11 0.2 129
Show 18043+4206 ROE 1 AB 186 24.3 129
Show 18197+4453 ES 2665 AB 21 9.9 130

 
 
WDS 18084+4407 : COMPONENTS
 
 
  A
B pa=198.3°
sep=0.13"
 
 
18084+4407 A
 
 
Componente originario normalizzato AB Name HD 166409 Coord arcsec 2000 180821.80+440645.1 Mag 7.58
Spectral class F5 (yellow-white) PmRA 21.00 PmDE 25.0 SAO 47250
HIP 88852 Tycho2 3114-01636-1 HD 166409 GC 24749
BD BD+44 2829
Tycho2
Tycho2 3114-01636-1 Pflag RAmdeg 272.09089375 DEmdeg 44.11258716
PmRA 20.7 PmDE 27.7 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.51 EpDEm 1991.43
Num 10 Q RAmdeg 1.5 Q DEmdeg 1.0 Q pmRA 1.4
Q pmDE 0.9 BTmag 7.360 E BTmag 0.015 VTmag 6.882
E VTmag 0.010 Prox 999 TYC T HIP 88852
CCDM AB RAdeg 272.09082778 DEdeg 44.11252278 EpRA 1990 1.73
EpDE 1990 1.63 E RAdeg 3.9 E DEdeg 4.1 Posflg P
Corr -0.1
SAO
SAO 47250 DelFlag RA1950 PmRA1950 0.0016
DE1950 PmDE1950 0.028 Vmag 6.6 SpType F5
Double code Source 70 CatNum 24749 DM BD+44 2829
DMcomp BDsup HD 166409 M HD 0
GC 24749 RA1950rad 4.74239778 DE1950rad 0.76974186 PmRA2000 0.0021
PmDE2000 0.028
Hipparcos
Catalog H HIP 88852 Proxy H RAhms 18 08 21.80
DEdms +44 06 45.1 Vmag 6.84 VarFlag R Vmag H
RAdeg 272.091 DEdeg 44.1125 AstroRef * Plx 10.33
CCDM 18084+4407 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 25 Rho 0.132 HD 166409 BD BD+44 2829
CD CP Dm number +44 2829 VIred 0.52
SpType F5 R SpType Coord arcsec 2000 180821.80+440645.1
Hipparcos 2
HIP 88852 Sn 55 So 3 Nc 2
RArad 4.7488806532 DErad 0.769908704 Plx 9.88 PmRA 21.36
PmDE 25.28 E RArad 0.38 E DErad 0.39 E Plx 0.43
E pmRA 0.41 E pmDE 0.45 Hpmag 6.9363 E Hpmag 0.0011
SHp 0.008 VA 0 BV 0.44 E BV 0.007
VI 0.51
CCDM
Ccdm 18084+4407 RComp Comp A Note1
Note2 Discov num DRAs -2.19 DDEs -14.8
R dRAs 82 Year Theta Rho
Obs 2 Vmag 7.6 Sp F5 PmNote *
PmRA 21 PmDE 25 Dm number +44 2829 Cat1 BD
Name2 +44 1456 Cat2 AGK2/3 HD 166409 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 88852
 
 
18084+4407 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 180821.80+440645.0 Mag 7.81 Calc delta mag 0.23
Calc coord yes
CCDM
Ccdm 18084+4407 RComp Comp B Note1
Note2 Discov num HDS DRAs -2.19 DDEs -14.6
R dRAs 82 Year 1991 Theta 25 Rho 0.1
Obs 1 Vmag 7.8 Sp PmNote *
PmRA 21 PmDE 25 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 88852