Double Star Calculator - Orbit

Orbital Elements for WSI6AB

WDS:	WSI6AB	WDS ID/Discoverer
P:	19.205	Orbital period (years)
a:	0.2195	Semi-major axis (arcseconds)
i:	65.1	Inclination (degrees)
Ω:	102.8	Longitude of ascending node (degrees)
T:	2006.259	Epoch of periastron passage (year)
e:	0.1743	Eccentricity
ω:	17.6	Longitude of periastron (degrees)
Start-Year:	2015.3975	Year
End-Year:	2034.6025	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI6AB
Position:	210407.38+025940.1	Epoch-2000 right ascension and declination
WDS-ID:	21041+0300	WDS designation
Discoverer Code:	WSI6AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	200580	HD catalog number
Hipparcos number:	103987	Hipparcos catalog number
V1:	7.5	Magnitude of the primary
V2:	9.5	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2016	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2017a	Reference

Double Star Orbit for WSI6AB

WDS 6th Orbit including measures of WSI6AB

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of WSI6AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.141   125.87
--------------------------
2015.40    0.253   287.65
2015.50    0.252   288.23
2015.60    0.251   288.82
2015.70    0.250   289.42
2015.80    0.249   290.02
2015.90    0.247   290.63
2016.00    0.246   291.24
2016.10    0.244   291.87
2016.20    0.242   292.50
2016.30    0.240   293.15
2016.40    0.238   293.80
2016.50    0.236   294.47
2016.60    0.233   295.15
2016.70    0.231   295.84
2016.80    0.228   296.55
2016.90    0.226   297.28
2017.00    0.223   298.03
2017.10    0.220   298.79
2017.20    0.217   299.58
2017.30    0.213   300.39
2017.40    0.210   301.22
2017.50    0.207   302.08
2017.60    0.203   302.97
2017.70    0.200   303.90
2017.80    0.196   304.85
2017.90    0.192   305.84
2018.00    0.189   306.88
2018.10    0.185   307.95
2018.20    0.181   309.07
2018.30    0.177   310.24
2018.40    0.173   311.47
2018.50    0.169   312.76
2018.60    0.164   314.11
2018.70    0.160   315.53
2018.80    0.156   317.02
2018.90    0.152   318.60
2019.00    0.148   320.27
2019.10    0.144   322.03
2019.20    0.139   323.90
2019.30    0.135   325.89
2019.40    0.131   327.99
2019.50    0.127   330.23
2019.60    0.124   332.61
2019.70    0.120   335.14
2019.80    0.116   337.83
2019.90    0.113   340.69
2020.00    0.110   343.72
2020.10    0.107   346.92
2020.20    0.104   350.30
2020.30    0.101   353.85
2020.40    0.099   357.57
2020.50    0.098     1.44
2020.60    0.096     5.43
2020.70    0.095     9.53
2020.80    0.094    13.70
2020.90    0.094    17.90
2021.00    0.094    22.11
2021.10    0.095    26.28
2021.20    0.096    30.38
2021.30    0.097    34.38
2021.40    0.099    38.26
2021.50    0.101    41.99
2021.60    0.104    45.56
2021.70    0.106    48.96
2021.80    0.109    52.19
2021.90    0.112    55.25
2022.00    0.115    58.15
2022.10    0.119    60.88
2022.20    0.122    63.46
2022.30    0.126    65.90
2022.40    0.129    68.20
2022.50    0.133    70.38
2022.60    0.137    72.44
2022.70    0.140    74.40
2022.80    0.144    76.26
2022.90    0.147    78.03
2023.00    0.151    79.71
2023.10    0.154    81.33
2023.20    0.157    82.88
2023.30    0.160    84.36
2023.40    0.163    85.79
2023.50    0.166    87.18
2023.60    0.169    88.51
2023.70    0.171    89.81
2023.80    0.173    91.08
2023.90    0.175    92.31
2024.00    0.177    93.52
2024.10    0.179    94.70
2024.20    0.180    95.87
2024.30    0.181    97.02
2024.40    0.182    98.15
2024.50    0.182    99.28
2024.60    0.183   100.41
2024.70    0.183   101.53
2024.80    0.183   102.65
2024.90    0.182   103.78
2025.00    0.181   104.91
2025.10    0.180   106.05
2025.20    0.179   107.21
2025.30    0.177   108.39
2025.40    0.176   109.59
2025.50    0.174   110.82
2025.60    0.171   112.08
2025.70    0.169   113.38
2025.80    0.166   114.71
2025.90    0.163   116.10
2026.00    0.160   117.54
2026.10    0.156   119.04
2026.20    0.153   120.61
2026.30    0.149   122.26
2026.40    0.145   123.99
2026.50    0.141   125.82
2026.60    0.137   127.76
2026.70    0.133   129.82
2026.80    0.128   132.02
2026.90    0.124   134.37
2027.00    0.120   136.88
2027.10    0.116   139.58
2027.20    0.112   142.49
2027.30    0.107   145.61
2027.40    0.104   148.97
2027.50    0.100   152.59
2027.60    0.097   156.46
2027.70    0.094   160.61
2027.80    0.091   165.01
2027.90    0.089   169.65
2028.00    0.087   174.51
2028.10    0.086   179.54
2028.20    0.085   184.69
2028.30    0.085   189.88
2028.40    0.085   195.04
2028.50    0.086   200.12
2028.60    0.088   205.05
2028.70    0.090   209.77
2028.80    0.093   214.26
2028.90    0.096   218.48
2029.00    0.099   222.44
2029.10    0.103   226.12
2029.20    0.107   229.54
2029.30    0.111   232.71
2029.40    0.115   235.65
2029.50    0.120   238.37
2029.60    0.124   240.89
2029.70    0.129   243.22
2029.80    0.134   245.39
2029.90    0.139   247.41
2030.00    0.143   249.30
2030.10    0.148   251.06
2030.20    0.153   252.71
2030.30    0.158   254.26
2030.40    0.163   255.72
2030.50    0.167   257.10
2030.60    0.172   258.40
2030.70    0.176   259.64
2030.80    0.181   260.81
2030.90    0.185   261.93
2031.00    0.189   263.00
2031.10    0.193   264.02
2031.20    0.198   265.00
2031.30    0.201   265.94
2031.40    0.205   266.85
2031.50    0.209   267.72
2031.60    0.213   268.56
2031.70    0.216   269.38
2031.80    0.219   270.17
2031.90    0.222   270.94
2032.00    0.225   271.68
2032.10    0.228   272.41
2032.20    0.231   273.12
2032.30    0.234   273.81
2032.40    0.236   274.49
2032.50    0.239   275.16
2032.60    0.241   275.81
2032.70    0.243   276.45
2032.80    0.245   277.08
2032.90    0.246   277.70
2033.00    0.248   278.31
2033.10    0.249   278.92
2033.20    0.251   279.52
2033.30    0.252   280.11
2033.40    0.253   280.70
2033.50    0.254   281.28
2033.60    0.254   281.86
2033.70    0.255   282.44
2033.80    0.255   283.01
2033.90    0.256   283.59
2034.00    0.256   284.16
2034.10    0.256   284.73
2034.20    0.256   285.31
2034.30    0.255   285.88
2034.40    0.255   286.46
2034.50    0.254   287.03
2034.60    0.253   287.62

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 18:22:11