Double Star Calculator - Orbit

Orbital Elements for HDS1866

WDS:	HDS1866	WDS ID/Discoverer
P:	22.720	Orbital period (years)
a:	0.1435	Semi-major axis (arcseconds)
i:	137.8	Inclination (degrees)
Ω:	18.3	Longitude of ascending node (degrees)
T:	2008.290	Epoch of periastron passage (year)
e:	0.397	Eccentricity
ω:	225.8	Longitude of periastron (degrees)
Start-Year:	2013.64	Year
End-Year:	2036.36	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1866
Position:	131858.38-253544.0	Epoch-2000 right ascension and declination
WDS-ID:	13190-2536	WDS designation
Discoverer Code:	HDS1866	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	115683	HD catalog number
Hipparcos number:	64970	Hipparcos catalog number
V1:	8.52	Magnitude of the primary
V2:	9.90	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2020e	Reference

Double Star Orbit for HDS1866

WDS 6th Orbit including measures of HDS1866

-- 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 HDS1866

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.114   263.80
--------------------------
2013.64    0.159    23.05
2013.74    0.161    22.19
2013.84    0.162    21.34
2013.94    0.164    20.50
2014.04    0.165    19.68
2014.14    0.166    18.87
2014.24    0.167    18.07
2014.34    0.169    17.29
2014.44    0.170    16.51
2014.54    0.171    15.75
2014.64    0.172    15.00
2014.74    0.173    14.25
2014.84    0.174    13.51
2014.94    0.175    12.78
2015.04    0.176    12.06
2015.14    0.177    11.35
2015.24    0.177    10.64
2015.34    0.178     9.93
2015.44    0.179     9.24
2015.54    0.179     8.55
2015.64    0.180     7.86
2015.74    0.181     7.18
2015.84    0.181     6.50
2015.94    0.182     5.82
2016.04    0.182     5.15
2016.14    0.182     4.48
2016.24    0.183     3.82
2016.34    0.183     3.16
2016.44    0.183     2.49
2016.54    0.184     1.84
2016.64    0.184     1.18
2016.74    0.184     0.52
2016.84    0.184   359.87
2016.94    0.184   359.22
2017.04    0.184   358.56
2017.14    0.184   357.91
2017.24    0.184   357.26
2017.34    0.184   356.61
2017.44    0.184   355.95
2017.54    0.184   355.30
2017.64    0.184   354.65
2017.74    0.184   353.99
2017.84    0.184   353.34
2017.94    0.184   352.68
2018.04    0.183   352.02
2018.14    0.183   351.36
2018.24    0.183   350.70
2018.34    0.182   350.03
2018.44    0.182   349.36
2018.54    0.182   348.69
2018.64    0.181   348.02
2018.74    0.181   347.34
2018.84    0.180   346.66
2018.94    0.180   345.98
2019.04    0.179   345.29
2019.14    0.179   344.60
2019.24    0.178   343.90
2019.34    0.178   343.20
2019.44    0.177   342.50
2019.54    0.176   341.79
2019.64    0.176   341.07
2019.74    0.175   340.35
2019.84    0.174   339.62
2019.94    0.174   338.89
2020.04    0.173   338.15
2020.14    0.172   337.41
2020.24    0.171   336.66
2020.34    0.171   335.90
2020.44    0.170   335.13
2020.54    0.169   334.36
2020.64    0.168   333.58
2020.74    0.167   332.79
2020.84    0.166   331.99
2020.94    0.165   331.18
2021.04    0.165   330.37
2021.14    0.164   329.54
2021.24    0.163   328.71
2021.34    0.162   327.87
2021.44    0.161   327.01
2021.54    0.160   326.15
2021.64    0.159   325.27
2021.74    0.158   324.39
2021.84    0.157   323.49
2021.94    0.156   322.58
2022.04    0.155   321.66
2022.14    0.154   320.73
2022.24    0.153   319.78
2022.34    0.152   318.82
2022.44    0.151   317.85
2022.54    0.149   316.87
2022.64    0.148   315.87
2022.74    0.147   314.85
2022.84    0.146   313.82
2022.94    0.145   312.78
2023.04    0.144   311.72
2023.14    0.143   310.65
2023.24    0.142   309.56
2023.34    0.141   308.45
2023.44    0.140   307.32
2023.54    0.139   306.18
2023.64    0.138   305.02
2023.74    0.137   303.85
2023.84    0.136   302.65
2023.94    0.135   301.44
2024.04    0.134   300.21
2024.14    0.133   298.96
2024.24    0.132   297.69
2024.34    0.131   296.40
2024.44    0.130   295.10
2024.54    0.129   293.77
2024.64    0.128   292.42
2024.74    0.127   291.06
2024.84    0.126   289.67
2024.94    0.125   288.27
2025.04    0.124   286.84
2025.14    0.123   285.39
2025.24    0.123   283.93
2025.34    0.122   282.44
2025.44    0.121   280.93
2025.54    0.120   279.41
2025.64    0.119   277.86
2025.74    0.119   276.30
2025.84    0.118   274.71
2025.94    0.117   273.11
2026.04    0.117   271.49
2026.14    0.116   269.85
2026.24    0.115   268.19
2026.34    0.115   266.52
2026.44    0.114   264.82
2026.54    0.114   263.11
2026.64    0.113   261.39
2026.74    0.113   259.65
2026.84    0.112   257.89
2026.94    0.112   256.12
2027.04    0.111   254.33
2027.14    0.111   252.53
2027.24    0.110   250.71
2027.34    0.110   248.88
2027.44    0.110   247.04
2027.54    0.109   245.18
2027.64    0.109   243.31
2027.74    0.108   241.43
2027.84    0.108   239.53
2027.94    0.108   237.62
2028.04    0.107   235.69
2028.14    0.107   233.75
2028.24    0.106   231.80
2028.34    0.106   229.83
2028.44    0.105   227.84
2028.54    0.105   225.83
2028.64    0.104   223.81
2028.74    0.104   221.76
2028.84    0.103   219.69
2028.94    0.103   217.60
2029.04    0.102   215.48
2029.14    0.101   213.33
2029.24    0.100   211.14
2029.34    0.099   208.92
2029.44    0.099   206.66
2029.54    0.098   204.35
2029.64    0.096   201.99
2029.74    0.095   199.58
2029.84    0.094   197.11
2029.94    0.093   194.56
2030.04    0.091   191.95
2030.14    0.090   189.25
2030.24    0.088   186.46
2030.34    0.087   183.57
2030.44    0.085   180.58
2030.54    0.084   177.47
2030.64    0.082   174.23
2030.74    0.080   170.85
2030.84    0.079   167.33
2030.94    0.077   163.66
2031.04    0.075   159.84
2031.14    0.074   155.85
2031.24    0.073   151.71
2031.34    0.071   147.42
2031.44    0.070   142.99
2031.54    0.069   138.44
2031.64    0.069   133.78
2031.74    0.068   129.06
2031.84    0.068   124.30
2031.94    0.068   119.54
2032.04    0.069   114.81
2032.14    0.069   110.15
2032.24    0.070   105.60
2032.34    0.071   101.18
2032.44    0.073    96.91
2032.54    0.074    92.82
2032.64    0.076    88.90
2032.74    0.078    85.18
2032.84    0.080    81.64
2032.94    0.082    78.29
2033.04    0.085    75.11
2033.14    0.087    72.11
2033.24    0.090    69.28
2033.34    0.092    66.60
2033.44    0.095    64.06
2033.54    0.097    61.66
2033.64    0.100    59.39
2033.74    0.103    57.23
2033.84    0.105    55.18
2033.94    0.108    53.23
2034.04    0.111    51.37
2034.14    0.113    49.59
2034.24    0.116    47.90
2034.34    0.118    46.28
2034.44    0.121    44.72
2034.54    0.123    43.23
2034.64    0.126    41.80
2034.74    0.128    40.42
2034.84    0.130    39.08
2034.94    0.133    37.80
2035.04    0.135    36.56
2035.14    0.137    35.35
2035.24    0.139    34.19
2035.34    0.141    33.06
2035.44    0.143    31.96
2035.54    0.145    30.89
2035.64    0.147    29.85
2035.74    0.149    28.84
2035.84    0.151    27.85
2035.94    0.152    26.89
2036.04    0.154    25.94
2036.14    0.156    25.02
2036.24    0.157    24.12
2036.34    0.159    23.23

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 16:54:56