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Doubles in session


Current system
18150-5018
I 429
HD 166839


Nearby doubles
14' : 18146-5031
BRT1037

25' : 18129-5034
HDO 288

29' : 18133-4955
B 2434

30' : 18129-4959
HRG 128

32' : 18130-5044
RST 971

44' : 18104-5019
RST 968

51' : 18153-4928
TOK 915

55' : 18174-4929
HDS2586

61' : 18189-5107
RST 974

68' : 18165-4913
SKF1145

71' : 18205-5107
BRT1043

74' : 18177-4910
BRT1040

74' : 18199-5121
LDS 637

82' : 18071-4949
I 1350

83' : 18232-4953
KPP1538

86' : 18075-5106
RST 964

87' : 18063-5045
TDT 685

88' : 18154-4851
HJ 5033AB

88' : 18204-4908
I 1361

91' : 18155-5149
HDS2578

93' : 18244-5042
TDT 842

94' : 18119-5147
RST 970

96' : 18065-4931
I 622

96' : 18231-4923
UC 3568

97' : 18242-4942
UC 3572

98' : 18074-5124
RST 963



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.

18150-5018 I 429 (HD 166839)

 
 
18h 15m 00.43s -50° 18' 29.0" P.A. 303.00 sep 0.1 mag 8.00,8.20 Sp A0V
 
 
Coord 2000 18150-5018 Discov num I   429 Comp Coord arcsec 2000 18 15 00.43 -50 18 29.0
Date first 1902 Date last 2021 Obs 29
Pa first 150 Pa last 302.5 P.A. Now (θ) 124.8°
Sep first 0.5 Sep last 0.056 Sep. Now (ρ) 0.076"
Mag pri 8.00 Mag sec 8.20 delta mag (ΔM) 0.2 Spectral class A0V (white)
Pri motion ra +004 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166839 Constellation Telescopium SAO 245344 Tycho2 8366-02361-1
Gaia DR2 6703329357805862016 HD 166839 GC 24867
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)69.81y± 2 Periastron (T)1946.53y± 0.85 Semi-major axis (a)0.096a± 0.003
Eccentricity (e)0.887± 0.01 Inclination (i)66.1°± 3 Longitude of periastron (ω)355.9°± 10
Node (Ω)320.1°± 6 Notesn ReferenceDoc2022b
Equinox Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 144.3 0.144
2001 144.7 0.139
2002 145.2 0.134
2003 145.7 0.129
2004 146.3 0.123
2005 146.9 0.117
2006 147.6 0.110
2007 148.4 0.103
2008 149.3 0.096
2009 150.3 0.087
2010 151.6 0.078
2011 153.3 0.068
2012 155.5 0.058
2013 158.9 0.045
2014 165.0 0.032
2015 182.0 0.016
2016 286.6 0.008
2017 24.1 0.008
2018 96.4 0.019
2019 111.1 0.032
2020 117.2 0.045
2021 120.7 0.056
2022 123.1 0.067
2023 124.8 0.076
2024 126.2 0.085
2025 127.3 0.093
2026 128.3 0.100
2027 129.1 0.107
2028 129.8 0.114
2029 130.5 0.120
2030 131.1 0.126


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


 
  


wds18150-5018b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)130y Periastron (T)2013.19y± 4.23 Semi-major axis (a)0.193a± 0.004
Eccentricity (e)0.129± 0.031 Inclination (i)84.8°± 0.4 Longitude of periastron (ω)78.8°± 14.7
Node (Ω)138.1°± 0.7 Notesn ReferenceTok2021f
Equinox Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 141.4 0.148
2001 141.8 0.141
2002 142.3 0.135
2003 142.8 0.127
2004 143.5 0.120
2005 144.1 0.112
2006 145.0 0.103
2007 145.9 0.094
2008 147.1 0.085
2009 148.5 0.076
2010 150.3 0.067
2011 152.8 0.057
2012 156.2 0.047
2013 161.4 0.038
2014 170.1 0.028
2015 186.2 0.020
2016 216.8 0.016
2017 254.4 0.017
2018 278.0 0.024
2019 290.2 0.032
2020 297.1 0.042
2021 301.4 0.051
2022 304.4 0.061
2023 306.5 0.071
2024 308.1 0.080
2025 309.4 0.089
2026 310.5 0.098
2027 311.4 0.107
2028 312.1 0.115
2029 312.8 0.124
2030 313.3 0.131


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


 
  


wds18150-5018d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18150-5018 I 429 (HD 166839) : NOTES
 
 
discov_num notes refcode
I 429 Measures scattered, but probable rapid motion.
 
 
REFERENCES
 
 
refcode metd author reference
Doc2022b orb - Docobo, J.A., Campo, P., Mendez, R.A., & Costa, E. 2022IAUDS.206....1S
Doc2022b Inf. Circ. 206, 1, 2021
Tok2021f orb - Tokovinin, A. 2021IAUDS.204....1T
Tok2021f Inf. Circ. 204, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18150-5018 I 429 1991 16 140 0.2 8.00 8.20 A0V N 181500.43-501829.0
18150-5018 I 429 2009 18 149 0.1 8.00 8.20 A0V N 181500.43-501829.0
18150-5018 I 429 2013 19 162 0.0 8.00 8.20 A0V N 181500.43-501829.0
18150-5018 I 429 2014 21 169 0.0 8.00 8.20 A0V N 181500.43-501829.0
18150-5018 I 429 2015 22 198 0.0 8.00 8.20 A0V N 181500.43-501829.0
18150-5018 I 429 2018 24 289 0.0 8.00 8.20 A0V NO 181500.43-501829.0
18150-5018 I 429 2019 26 293 0.0 8.00 8.20 A0V NO 181500.43-501829.0
18150-5018 I 429 2020 28 300 0.1 8.00 8.20 A0V NO 181500.43-501829.0
18150-5018 I 429 2021 29 303 0.1 8.00 8.20 A0V NO 181500.43-501829.0

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

 
 
WDS 18150-5018 I 429 (HD 166839) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18150-5018 I 429 (HD 166839) : MEASURES
 
 
No records found.

 
 
WDS 18150-5018 (HD 166839) : VIRTUAL EYEPIECE
 
 

18150-5018 I 429A mag 8 Sp A0V 18150-5018 I 429B mag 8.2 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 18150-5018 (HD 166839) : ALADIN DSS IMAGE @ 18h 15m 00.43s -50° 18' 29.0"
 
 
 
 
WDS 18150-5018 I 429 (HD 166839) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18150-5018 I 429 distance=0' 18146-5031 BRT1037 distance=14' 18129-5034 HDO 288 distance=25' 18133-4955 B 2434 distance=29' 18129-4959 HRG 128 distance=30' 18130-5044 RST 971 distance=32' 18104-5019 RST 968 distance=44' 18153-4928 TOK 915 distance=51' 18174-4929 HDS2586 distance=55' 18189-5107 RST 974 distance=61' 18165-4913 SKF1145 distance=68' 18205-5107 BRT1043 distance=71' 18177-4910 BRT1040 distance=74' 18199-5121 LDS 637 distance=74' 18071-4949 I 1350 distance=82' 18232-4953 KPP1538 distance=83' 18075-5106 RST 964 distance=86' 18063-5045 TDT 685 distance=87' 18154-4851 HJ 5033AB distance=88' 18154-4851 HJ 5033AC distance=88' 18154-4851 HJ 5033AD distance=88' 18204-4908 I 1361 distance=88' 18155-5149 HDS2578 distance=91' 18244-5042 TDT 842 distance=93' 18119-5147 RST 970 distance=94' 18065-4931 I 622 distance=96' 18231-4923 UC 3568 distance=96' 18242-4942 UC 3572 distance=97' 18074-5124 RST 963 distance=98' 18210-5139 UC 3556 distance=99' 18240-5108 HDS2602 distance=99' 18100-4852 HJ 5017 distance=100' 18206-5144 CPO 582 distance=100' 18252-5048 UC 3575 distance=102' 18245-4932 UC 3574 distance=104' 18080-5139 RST 967 distance=105' 18124-4836 I 1354 distance=107' 18221-4857 RST 979 distance=107' 18150-4832 RSS 479 distance=107' 18150-4831 I 1356AB distance=108' 18150-4831 I 1356AC distance=108' 18201-5156 RST 975 distance=108' 18119-5205 DAW 21BC distance=111' 18119-5205 HJ 5022A,BC distance=111' 18267-4957 BRT1053 distance=115' 18050-4917 B 2854 distance=116' 18261-5107 UC 3581 distance=116' 18220-4845 SWR 243 distance=116' 18249-5128 KPP2547 distance=117' 18207-5203 HDS2593 distance=118' 18026-5013 HDS2540 distance=119' 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 18150-5018 I 429 303 0.1
Show 18146-5031 BRT1037 323 4.5 14
Show 18129-5034 HDO 288 116 1.6 25
Show 18133-4955 B 2434 203 6.3 29
Show 18129-4959 HRG 128 358 6.8 30
Show 18130-5044 RST 971 112 0.3 32
Show 18104-5019 RST 968 137 0.6 44
Show 18153-4928 TOK 915 283 0.1 51
Show 18174-4929 HDS2586 32 2.3 55
Show 18189-5107 RST 974 206 0.3 61
Show 18165-4913 SKF1145 158 52.9 68
Show 18205-5107 BRT1043 85 5.5 71
Show 18177-4910 BRT1040 99 5.5 74
Show 18199-5121 LDS 637 162 23.0 74
Show 18071-4949 I 1350 210 0.6 82
Show 18232-4953 KPP1538 285 11.6 83
Show 18075-5106 RST 964 232 5.4 86
Show 18063-5045 TDT 685 293 0.5 87
Show 18154-4851 HJ 5033 AB 113 17.3 88
Show 18154-4851 HJ 5033 AC 10 15.6 88
Show 18154-4851 HJ 5033 AD 69 25.4 88
Show 18204-4908 I 1361 254 2.3 88
Show 18155-5149 HDS2578 333 0.4 91
Show 18244-5042 TDT 842 298 1.1 93
Show 18119-5147 RST 970 201 1.3 94
Show 18065-4931 I 622 44 0.6 96
Show 18231-4923 UC 3568 271 36.6 96
Show 18242-4942 UC 3572 156 74.0 97
Show 18074-5124 RST 963 101 3.2 98
Show 18210-5139 UC 3556 69 62.8 99
Show 18240-5108 HDS2602 13 3.6 99
Show 18100-4852 HJ 5017 320 22.5 100
Show 18206-5144 CPO 582 156 4.2 100
Show 18252-5048 UC 3575 30 21.8 102
Show 18245-4932 UC 3574 277 34.8 104
Show 18080-5139 RST 967 7 2.6 105
Show 18124-4836 I 1354 163 1.3 107
Show 18221-4857 RST 979 222 0.4 107
Show 18150-4832 RSS 479 207 24.6 107
Show 18150-4831 I 1356 AB 320 0.4 108
Show 18150-4831 I 1356 AC 167 8.1 108
Show 18201-5156 RST 975 212 0.6 108
Show 18119-5205 DAW 21 BC 102 1.6 111
Show 18119-5205 HJ 5022 A,BC 97 6.1 111
Show 18267-4957 BRT1053 268 5.1 115
Show 18050-4917 B 2854 7 5.6 116
Show 18261-5107 UC 3581 331 37.8 116
Show 18220-4845 SWR 243 93 24.6 116
Show 18249-5128 KPP2547 223 23.0 117
Show 18207-5203 HDS2593 79 13.9 118
Show 18026-5013 HDS2540 14 16.8 119

 
 
WDS 18150-5018 : COMPONENTS
 
 
  A
B pa=314.9°
sep=0.04"
 
 
18150-5018 A
 
 
Componente originario normalizzato AB Name HD 166839 Coord arcsec 2000 181500.43-501829.0 Mag 8
Spectral class A0V (white) PmRA 4.00 PmDE -38.0 SAO 245344
Tycho2 8366-02361-1 HD 166839 GC 24867 DM CD-5011800
Tycho2
Tycho2 8366-02361-1 Pflag RAmdeg 273.75180290 DEmdeg -50.30806586
PmRA 3.0 PmDE -33.2 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.30 EpDEm 1991.32
Num 13 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.7
Q pmDE 0.8 BTmag 7.263 E BTmag 0.015 VTmag 7.225
E VTmag 0.010 Prox 999 TYC T HIP
CCDM RAdeg 273.75179194 DEdeg -50.30798889 EpRA 1990 1.69
EpDE 1990 1.66 E RAdeg 3.9 E DEdeg 4.4 Posflg
Corr 0.0
SAO
SAO 245344 DelFlag RA1950 PmRA1950 -0.0035
DE1950 PmDE1950 -0.024 Vmag 7.3 SpType A0
Double code Source 70 CatNum 24867 DM CD-5011800
DMcomp BDsup HD 166839 M HD 0
GC 24867 RA1950rad 4.76082533 DE1950rad -0.87830751 PmRA2000 -0.0037
PmDE2000 -0.027
CCDM
Ccdm 18150-5018 RComp Comp A Note1
Note2 Discov num DRAs 0.44 DDEs -29.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.0 Sp A0 PmNote *
PmRA 2 PmDE -32 Dm number -5011800 Cat1 CD
Name2 245344 Cat2 SAO HD 166839 M HD
ADS BDS M ADS BDS N IDS IDS 18072S5020A
HIC
 
 
18150-5018 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 181500.43-501829.0 Mag 8.2 Calc delta mag 0.2
Calc coord yes
CCDM
Ccdm 18150-5018 RComp Comp B Note1
Note2 Discov num I 429 DRAs DDEs
R dRAs Year 1952 Theta Rho 0.1
Obs 7 Vmag 8.2 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N N IDS IDS 18072S5020B
HIC