Double Star Calculator - Orbit

Orbital Elements for STF2173AB
WDS: STF2173AB WDS ID/Discoverer
P: 46.585 Orbital period (years)
a: 0.96971 Semi-major axis (arcseconds)
i: 99.177 Inclination (degrees)
Ω: 151.769 Longitude of ascending node (degrees)
T: 2008.601 Epoch of periastron passage (year)
e: 0.17636 Eccentricity
ω: 324.57 Longitude of periastron (degrees)
Start-Year: 2001.7075 Year
End-Year: 2048.2925 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2173AB
Position: 173023.78-010346.2 Epoch-2000 right ascension and declination
WDS-ID: 17304-0104 WDS designation
Discoverer Code: STF2173AB Discover designation and components
ADS number: 10598 Aitken Double Star catalog
HD number: 158614 HD catalog number
Hipparcos number: 85667 Hipparcos catalog number
V1: 6.06 Magnitude of the primary
V2: 6.17 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 1 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Msn2023 Reference

Double Star Orbit for STF2173AB



WDS 6th Orbit including measures of STF2173AB

-- 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 STF2173AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.485   351.18
--------------------------
2001.71    0.294   304.25
2001.81    0.281   302.87
2001.91    0.269   301.36
2002.01    0.257   299.72
2002.11    0.245   297.91
2002.21    0.234   295.92
2002.31    0.222   293.72
2002.41    0.211   291.30
2002.51    0.201   288.60
2002.61    0.190   285.61
2002.71    0.181   282.29
2002.81    0.171   278.60
2002.91    0.163   274.51
2003.01    0.156   270.01
2003.11    0.149   265.08
2003.21    0.144   259.75
2003.31    0.140   254.06
2003.41    0.137   248.09
2003.51    0.136   241.96
2003.61    0.136   235.80
2003.71    0.138   229.74
2003.81    0.142   223.91
2003.91    0.146   218.40
2004.01    0.152   213.29
2004.11    0.159   208.59
2004.21    0.167   204.31
2004.31    0.176   200.44
2004.41    0.186   196.96
2004.51    0.196   193.82
2004.61    0.206   190.99
2004.71    0.217   188.44
2004.81    0.228   186.14
2004.91    0.240   184.05
2005.01    0.252   182.16
2005.11    0.263   180.44
2005.21    0.275   178.87
2005.31    0.288   177.43
2005.41    0.300   176.10
2005.51    0.312   174.88
2005.61    0.324   173.75
2005.71    0.337   172.71
2005.81    0.349   171.74
2005.91    0.361   170.83
2006.01    0.374   169.99
2006.11    0.386   169.20
2006.21    0.398   168.45
2006.31    0.410   167.75
2006.41    0.422   167.10
2006.51    0.434   166.47
2006.61    0.446   165.88
2006.71    0.458   165.33
2006.81    0.470   164.80
2006.91    0.481   164.29
2007.01    0.493   163.81
2007.11    0.504   163.35
2007.21    0.515   162.91
2007.31    0.526   162.49
2007.41    0.537   162.09
2007.51    0.548   161.70
2007.61    0.559   161.33
2007.71    0.569   160.97
2007.81    0.579   160.62
2007.91    0.590   160.29
2008.01    0.600   159.96
2008.11    0.609   159.65
2008.21    0.619   159.35
2008.31    0.628   159.06
2008.41    0.638   158.77
2008.51    0.647   158.49
2008.61    0.656   158.23
2008.71    0.664   157.96
2008.81    0.673   157.71
2008.91    0.681   157.46
2009.01    0.689   157.22
2009.11    0.697   156.98
2009.21    0.704   156.75
2009.31    0.712   156.52
2009.41    0.719   156.30
2009.51    0.726   156.08
2009.61    0.733   155.86
2009.71    0.739   155.65
2009.81    0.745   155.44
2009.91    0.752   155.24
2010.01    0.757   155.04
2010.11    0.763   154.84
2010.21    0.768   154.65
2010.31    0.773   154.46
2010.41    0.778   154.27
2010.51    0.783   154.08
2010.61    0.787   153.89
2010.71    0.791   153.71
2010.81    0.795   153.53
2010.91    0.799   153.35
2011.01    0.802   153.17
2011.11    0.806   153.00
2011.21    0.809   152.82
2011.31    0.811   152.65
2011.41    0.814   152.47
2011.51    0.816   152.30
2011.61    0.818   152.13
2011.71    0.820   151.96
2011.81    0.821   151.79
2011.91    0.823   151.62
2012.01    0.824   151.46
2012.11    0.824   151.29
2012.21    0.825   151.12
2012.31    0.825   150.95
2012.41    0.825   150.78
2012.51    0.825   150.62
2012.61    0.825   150.45
2012.71    0.824   150.28
2012.81    0.823   150.11
2012.91    0.822   149.95
2013.01    0.821   149.78
2013.11    0.820   149.61
2013.21    0.818   149.44
2013.31    0.816   149.27
2013.41    0.814   149.09
2013.51    0.811   148.92
2013.61    0.809   148.75
2013.71    0.806   148.57
2013.81    0.803   148.40
2013.91    0.800   148.22
2014.01    0.796   148.04
2014.11    0.793   147.86
2014.21    0.789   147.68
2014.31    0.785   147.49
2014.41    0.781   147.31
2014.51    0.776   147.12
2014.61    0.772   146.93
2014.71    0.767   146.74
2014.81    0.762   146.54
2014.91    0.757   146.34
2015.01    0.752   146.14
2015.11    0.746   145.94
2015.21    0.741   145.73
2015.31    0.735   145.52
2015.41    0.729   145.31
2015.51    0.723   145.09
2015.61    0.716   144.87
2015.71    0.710   144.65
2015.81    0.703   144.42
2015.91    0.696   144.19
2016.01    0.690   143.95
2016.11    0.682   143.71
2016.21    0.675   143.46
2016.31    0.668   143.21
2016.41    0.660   142.95
2016.51    0.653   142.68
2016.61    0.645   142.41
2016.71    0.637   142.13
2016.81    0.629   141.85
2016.91    0.621   141.56
2017.01    0.613   141.26
2017.11    0.605   140.95
2017.21    0.596   140.64
2017.31    0.588   140.31
2017.41    0.579   139.97
2017.51    0.570   139.63
2017.61    0.562   139.27
2017.71    0.553   138.91
2017.81    0.544   138.53
2017.91    0.535   138.13
2018.01    0.525   137.73
2018.11    0.516   137.31
2018.21    0.507   136.87
2018.31    0.497   136.42
2018.41    0.488   135.95
2018.51    0.479   135.46
2018.61    0.469   134.95
2018.71    0.459   134.42
2018.81    0.450   133.87
2018.91    0.440   133.29
2019.01    0.430   132.69
2019.11    0.421   132.06
2019.21    0.411   131.40
2019.31    0.401   130.71
2019.41    0.391   129.98
2019.51    0.382   129.22
2019.61    0.372   128.41
2019.71    0.362   127.57
2019.81    0.352   126.67
2019.91    0.342   125.73
2020.01    0.333   124.72
2020.11    0.323   123.66
2020.21    0.314   122.54
2020.31    0.304   121.34
2020.41    0.295   120.07
2020.51    0.285   118.71
2020.61    0.276   117.26
2020.71    0.267   115.72
2020.81    0.258   114.06
2020.91    0.250   112.30
2021.01    0.241   110.40
2021.11    0.233   108.37
2021.21    0.225   106.19
2021.31    0.217   103.86
2021.41    0.210   101.36
2021.51    0.203    98.69
2021.61    0.197    95.84
2021.71    0.191    92.80
2021.81    0.185    89.58
2021.91    0.181    86.17
2022.01    0.176    82.59
2022.11    0.173    78.85
2022.21    0.170    74.98
2022.31    0.168    71.00
2022.41    0.167    66.94
2022.51    0.167    62.85
2022.61    0.167    58.76
2022.71    0.169    54.71
2022.81    0.171    50.75
2022.91    0.174    46.90
2023.01    0.177    43.20
2023.11    0.182    39.65
2023.21    0.187    36.28
2023.31    0.192    33.10
2023.41    0.198    30.10
2023.51    0.205    27.29
2023.61    0.212    24.65
2023.71    0.219    22.19
2023.81    0.227    19.90
2023.91    0.235    17.75
2024.01    0.243    15.75
2024.11    0.252    13.89
2024.21    0.260    12.15
2024.31    0.269    10.52
2024.41    0.278     9.00
2024.51    0.288     7.58
2024.61    0.297     6.24
2024.71    0.307     4.99
2024.81    0.316     3.81
2024.91    0.326     2.71
2025.01    0.336     1.66
2025.11    0.345     0.68
2025.21    0.355   359.75
2025.31    0.365   358.87
2025.41    0.375   358.04
2025.51    0.385   357.25
2025.61    0.395   356.50
2025.71    0.405   355.79
2025.81    0.415   355.11
2025.91    0.425   354.46
2026.01    0.435   353.85
2026.11    0.445   353.26
2026.21    0.455   352.70
2026.31    0.465   352.16
2026.41    0.475   351.64
2026.51    0.485   351.15
2026.61    0.495   350.67
2026.71    0.505   350.22
2026.81    0.515   349.78
2026.91    0.525   349.36
2027.01    0.535   348.95
2027.11    0.544   348.56
2027.21    0.554   348.18
2027.31    0.564   347.82
2027.41    0.573   347.46
2027.51    0.583   347.12
2027.61    0.593   346.79
2027.71    0.602   346.47
2027.81    0.612   346.16
2027.91    0.621   345.86
2028.01    0.630   345.57
2028.11    0.639   345.29
2028.21    0.649   345.01
2028.31    0.658   344.74
2028.41    0.667   344.48
2028.51    0.676   344.23
2028.61    0.685   343.98
2028.71    0.694   343.74
2028.81    0.703   343.51
2028.91    0.711   343.28
2029.01    0.720   343.06
2029.11    0.729   342.84
2029.21    0.737   342.63
2029.31    0.746   342.42
2029.41    0.754   342.22
2029.51    0.762   342.02
2029.61    0.771   341.83
2029.71    0.779   341.64
2029.81    0.787   341.45
2029.91    0.795   341.27
2030.01    0.803   341.09
2030.11    0.811   340.91
2030.21    0.818   340.74
2030.31    0.826   340.57
2030.41    0.834   340.41
2030.51    0.841   340.25
2030.61    0.848   340.09
2030.71    0.856   339.93
2030.81    0.863   339.77
2030.91    0.870   339.62
2031.01    0.877   339.47
2031.11    0.884   339.33
2031.21    0.891   339.18
2031.31    0.898   339.04
2031.41    0.904   338.90
2031.51    0.911   338.76
2031.61    0.917   338.62
2031.71    0.924   338.49
2031.81    0.930   338.36
2031.91    0.936   338.22
2032.01    0.942   338.09
2032.11    0.948   337.97
2032.21    0.954   337.84
2032.31    0.960   337.72
2032.41    0.966   337.59
2032.51    0.971   337.47
2032.61    0.977   337.35
2032.71    0.982   337.23
2032.81    0.987   337.12
2032.91    0.992   337.00
2033.01    0.998   336.88
2033.11    1.002   336.77
2033.21    1.007   336.66
2033.31    1.012   336.54
2033.41    1.017   336.43
2033.51    1.021   336.32
2033.61    1.025   336.21
2033.71    1.030   336.11
2033.81    1.034   336.00
2033.91    1.038   335.89
2034.01    1.042   335.79
2034.11    1.046   335.68
2034.21    1.049   335.58
2034.31    1.053   335.48
2034.41    1.056   335.37
2034.51    1.060   335.27
2034.61    1.063   335.17
2034.71    1.066   335.07
2034.81    1.069   334.97
2034.91    1.072   334.87
2035.01    1.075   334.77
2035.11    1.077   334.67
2035.21    1.080   334.57
2035.31    1.082   334.48
2035.41    1.085   334.38
2035.51    1.087   334.28
2035.61    1.089   334.19
2035.71    1.091   334.09
2035.81    1.092   333.99
2035.91    1.094   333.90
2036.01    1.096   333.80
2036.11    1.097   333.71
2036.21    1.098   333.61
2036.31    1.100   333.52
2036.41    1.101   333.43
2036.51    1.101   333.33
2036.61    1.102   333.24
2036.71    1.103   333.14
2036.81    1.103   333.05
2036.91    1.104   332.96
2037.01    1.104   332.86
2037.11    1.104   332.77
2037.21    1.104   332.68
2037.31    1.104   332.58
2037.41    1.104   332.49
2037.51    1.103   332.39
2037.61    1.103   332.30
2037.71    1.102   332.21
2037.81    1.101   332.11
2037.91    1.100   332.02
2038.01    1.099   331.92
2038.11    1.098   331.83
2038.21    1.097   331.74
2038.31    1.095   331.64
2038.41    1.094   331.55
2038.51    1.092   331.45
2038.61    1.090   331.35
2038.71    1.088   331.26
2038.81    1.086   331.16
2038.91    1.084   331.06
2039.01    1.081   330.97
2039.11    1.079   330.87
2039.21    1.076   330.77
2039.31    1.073   330.67
2039.41    1.070   330.57
2039.51    1.067   330.47
2039.61    1.064   330.37
2039.71    1.060   330.27
2039.81    1.057   330.17
2039.91    1.053   330.07
2040.01    1.049   329.96
2040.11    1.045   329.86
2040.21    1.041   329.75
2040.31    1.037   329.65
2040.41    1.033   329.54
2040.51    1.028   329.44
2040.61    1.024   329.33
2040.71    1.019   329.22
2040.81    1.014   329.11
2040.91    1.009   329.00
2041.01    1.004   328.88
2041.11    0.998   328.77
2041.21    0.993   328.65
2041.31    0.987   328.54
2041.41    0.981   328.42
2041.51    0.975   328.30
2041.61    0.969   328.18
2041.71    0.963   328.06
2041.81    0.957   327.93
2041.91    0.951   327.81
2042.01    0.944   327.68
2042.11    0.937   327.55
2042.21    0.930   327.42
2042.31    0.923   327.29
2042.41    0.916   327.15
2042.51    0.909   327.02
2042.61    0.901   326.88
2042.71    0.894   326.74
2042.81    0.886   326.59
2042.91    0.878   326.45
2043.01    0.870   326.30
2043.11    0.862   326.14
2043.21    0.854   325.99
2043.31    0.846   325.83
2043.41    0.837   325.67
2043.51    0.829   325.51
2043.61    0.820   325.34
2043.71    0.811   325.17
2043.81    0.802   324.99
2043.91    0.793   324.81
2044.01    0.784   324.63
2044.11    0.774   324.44
2044.21    0.765   324.25
2044.31    0.755   324.05
2044.41    0.745   323.85
2044.51    0.736   323.64
2044.61    0.726   323.43
2044.71    0.715   323.21
2044.81    0.705   322.98
2044.91    0.695   322.75
2045.01    0.684   322.51
2045.11    0.674   322.26
2045.21    0.663   322.01
2045.31    0.652   321.74
2045.41    0.641   321.47
2045.51    0.630   321.19
2045.61    0.619   320.89
2045.71    0.608   320.59
2045.81    0.597   320.28
2045.91    0.585   319.95
2046.01    0.574   319.61
2046.11    0.562   319.26
2046.21    0.550   318.89
2046.31    0.539   318.50
2046.41    0.527   318.10
2046.51    0.515   317.68
2046.61    0.503   317.24
2046.71    0.491   316.78
2046.81    0.479   316.29
2046.91    0.466   315.78
2047.01    0.454   315.24
2047.11    0.442   314.67
2047.21    0.429   314.07
2047.31    0.417   313.43
2047.41    0.404   312.76
2047.51    0.392   312.04
2047.61    0.379   311.27
2047.71    0.367   310.45
2047.81    0.354   309.57
2047.91    0.342   308.63
2048.01    0.329   307.61
2048.11    0.317   306.52
2048.21    0.304   305.33






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 17:39:16



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