Double Star Calculator - Orbit

Orbital Elements for MLO4AB
WDS: MLO4AB WDS ID/Discoverer
P: 42.152 Orbital period (years)
a: 1.826 Semi-major axis (arcseconds)
i: 127.662 Inclination (degrees)
Ω: 133.574 Longitude of ascending node (degrees)
T: 1933.752 Epoch of periastron passage (year)
e: 0.57374 Eccentricity
ω: 68.451 Longitude of periastron (degrees)
Start-Year: 2003.924 Year
End-Year: 2046.076 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for MLO4AB
Position: 171857.16-345923.1 Epoch-2000 right ascension and declination
WDS-ID: 17190-3459 WDS designation
Discoverer Code: MLO4AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 156384 HD catalog number
Hipparcos number: 84709 Hipparcos catalog number
V1: 6.37 Magnitude of the primary
V2: 7.38 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 MLO4AB



WDS 6th Orbit including measures of MLO4AB

-- 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 MLO4AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.967   298.22
--------------------------
2003.92    1.615   224.91
2004.02    1.611   224.36
2004.12    1.607   223.81
2004.22    1.602   223.25
2004.32    1.598   222.70
2004.42    1.594   222.14
2004.52    1.590   221.58
2004.62    1.586   221.01
2004.72    1.581   220.44
2004.82    1.577   219.87
2004.92    1.573   219.30
2005.02    1.569   218.72
2005.12    1.565   218.14
2005.22    1.561   217.56
2005.32    1.557   216.97
2005.42    1.554   216.38
2005.52    1.550   215.79
2005.62    1.546   215.19
2005.72    1.542   214.60
2005.82    1.538   214.00
2005.92    1.535   213.39
2006.02    1.531   212.79
2006.12    1.527   212.18
2006.22    1.524   211.56
2006.32    1.520   210.95
2006.42    1.517   210.33
2006.52    1.513   209.71
2006.62    1.510   209.09
2006.72    1.506   208.46
2006.82    1.503   207.83
2006.92    1.500   207.20
2007.02    1.496   206.56
2007.12    1.493   205.92
2007.22    1.490   205.28
2007.32    1.487   204.64
2007.42    1.483   203.99
2007.52    1.480   203.35
2007.62    1.477   202.69
2007.72    1.474   202.04
2007.82    1.471   201.38
2007.92    1.468   200.72
2008.02    1.465   200.06
2008.12    1.462   199.39
2008.22    1.459   198.73
2008.32    1.456   198.06
2008.42    1.453   197.38
2008.52    1.451   196.71
2008.62    1.448   196.03
2008.72    1.445   195.35
2008.82    1.442   194.66
2008.92    1.439   193.98
2009.02    1.437   193.29
2009.12    1.434   192.59
2009.22    1.431   191.90
2009.32    1.428   191.20
2009.42    1.426   190.50
2009.52    1.423   189.80
2009.62    1.420   189.10
2009.72    1.418   188.39
2009.82    1.415   187.68
2009.92    1.412   186.96
2010.02    1.409   186.25
2010.12    1.407   185.53
2010.22    1.404   184.81
2010.32    1.401   184.08
2010.42    1.399   183.36
2010.52    1.396   182.63
2010.62    1.393   181.89
2010.72    1.390   181.16
2010.82    1.387   180.42
2010.92    1.384   179.68
2011.02    1.381   178.93
2011.12    1.378   178.18
2011.22    1.375   177.43
2011.32    1.372   176.68
2011.42    1.369   175.92
2011.52    1.366   175.16
2011.62    1.362   174.39
2011.72    1.359   173.62
2011.82    1.356   172.85
2011.92    1.352   172.07
2012.02    1.348   171.29
2012.12    1.345   170.50
2012.22    1.341   169.71
2012.32    1.337   168.92
2012.42    1.333   168.12
2012.52    1.328   167.31
2012.62    1.324   166.50
2012.72    1.319   165.69
2012.82    1.315   164.86
2012.92    1.310   164.04
2013.02    1.305   163.20
2013.12    1.299   162.36
2013.22    1.294   161.51
2013.32    1.288   160.66
2013.42    1.282   159.80
2013.52    1.276   158.92
2013.62    1.269   158.04
2013.72    1.263   157.16
2013.82    1.256   156.26
2013.92    1.248   155.35
2014.02    1.241   154.43
2014.12    1.233   153.50
2014.22    1.224   152.55
2014.32    1.216   151.59
2014.42    1.207   150.62
2014.52    1.197   149.64
2014.62    1.187   148.63
2014.72    1.177   147.61
2014.82    1.166   146.58
2014.92    1.155   145.52
2015.02    1.143   144.44
2015.12    1.131   143.34
2015.22    1.118   142.21
2015.32    1.104   141.05
2015.42    1.090   139.87
2015.52    1.075   138.65
2015.62    1.060   137.40
2015.72    1.044   136.12
2015.82    1.027   134.79
2015.92    1.010   133.41
2016.02    0.991   131.99
2016.12    0.973   130.51
2016.22    0.953   128.97
2016.32    0.932   127.37
2016.42    0.911   125.69
2016.52    0.889   123.94
2016.62    0.867   122.09
2016.72    0.843   120.14
2016.82    0.820   118.08
2016.92    0.795   115.89
2017.02    0.770   113.56
2017.12    0.745   111.08
2017.22    0.719   108.42
2017.32    0.693   105.56
2017.42    0.668   102.48
2017.52    0.642    99.15
2017.62    0.618    95.56
2017.72    0.594    91.67
2017.82    0.571    87.47
2017.92    0.551    82.94
2018.02    0.532    78.08
2018.12    0.516    72.88
2018.22    0.503    67.39
2018.32    0.493    61.64
2018.42    0.488    55.71
2018.52    0.486    49.69
2018.62    0.488    43.67
2018.72    0.494    37.75
2018.82    0.504    32.02
2018.92    0.518    26.56
2019.02    0.535    21.40
2019.12    0.554    16.59
2019.22    0.576    12.13
2019.32    0.600     8.00
2019.42    0.626     4.21
2019.52    0.653     0.72
2019.62    0.681   357.51
2019.72    0.710   354.56
2019.82    0.739   351.85
2019.92    0.769   349.34
2020.02    0.798   347.01
2020.12    0.828   344.86
2020.22    0.858   342.86
2020.32    0.888   340.99
2020.42    0.918   339.24
2020.52    0.947   337.60
2020.62    0.976   336.05
2020.72    1.004   334.60
2020.82    1.033   333.23
2020.92    1.061   331.93
2021.02    1.088   330.69
2021.12    1.115   329.52
2021.22    1.141   328.40
2021.32    1.167   327.33
2021.42    1.193   326.30
2021.52    1.218   325.32
2021.62    1.242   324.38
2021.72    1.267   323.48
2021.82    1.290   322.60
2021.92    1.313   321.76
2022.02    1.336   320.95
2022.12    1.358   320.17
2022.22    1.380   319.40
2022.32    1.401   318.67
2022.42    1.422   317.95
2022.52    1.442   317.26
2022.62    1.462   316.58
2022.72    1.482   315.92
2022.82    1.501   315.28
2022.92    1.519   314.66
2023.02    1.538   314.05
2023.12    1.556   313.45
2023.22    1.573   312.87
2023.32    1.590   312.30
2023.42    1.607   311.74
2023.52    1.623   311.20
2023.62    1.639   310.66
2023.72    1.655   310.14
2023.82    1.670   309.62
2023.92    1.685   309.11
2024.02    1.699   308.62
2024.12    1.714   308.13
2024.22    1.727   307.65
2024.32    1.741   307.17
2024.42    1.754   306.70
2024.52    1.767   306.25
2024.62    1.780   305.79
2024.72    1.792   305.35
2024.82    1.804   304.90
2024.92    1.816   304.47
2025.02    1.827   304.04
2025.12    1.839   303.62
2025.22    1.850   303.20
2025.32    1.860   302.78
2025.42    1.871   302.37
2025.52    1.881   301.97
2025.62    1.891   301.57
2025.72    1.900   301.17
2025.82    1.910   300.78
2025.92    1.919   300.39
2026.02    1.928   300.00
2026.12    1.936   299.62
2026.22    1.945   299.24
2026.32    1.953   298.87
2026.42    1.961   298.50
2026.52    1.969   298.13
2026.62    1.976   297.76
2026.72    1.984   297.40
2026.82    1.991   297.04
2026.92    1.998   296.68
2027.02    2.005   296.32
2027.12    2.011   295.97
2027.22    2.018   295.62
2027.32    2.024   295.27
2027.42    2.030   294.92
2027.52    2.036   294.58
2027.62    2.041   294.24
2027.72    2.047   293.89
2027.82    2.052   293.55
2027.92    2.057   293.22
2028.02    2.062   292.88
2028.12    2.067   292.55
2028.22    2.071   292.21
2028.32    2.076   291.88
2028.42    2.080   291.55
2028.52    2.084   291.22
2028.62    2.088   290.90
2028.72    2.092   290.57
2028.82    2.095   290.24
2028.92    2.099   289.92
2029.02    2.102   289.60
2029.12    2.105   289.28
2029.22    2.108   288.95
2029.32    2.111   288.63
2029.42    2.114   288.32
2029.52    2.117   288.00
2029.62    2.119   287.68
2029.72    2.122   287.36
2029.82    2.124   287.05
2029.92    2.126   286.73
2030.02    2.128   286.42
2030.12    2.130   286.10
2030.22    2.132   285.79
2030.32    2.133   285.47
2030.42    2.135   285.16
2030.52    2.136   284.85
2030.62    2.137   284.54
2030.72    2.138   284.22
2030.82    2.139   283.91
2030.92    2.140   283.60
2031.02    2.141   283.29
2031.12    2.142   282.98
2031.22    2.142   282.67
2031.32    2.143   282.36
2031.42    2.143   282.05
2031.52    2.143   281.74
2031.62    2.143   281.43
2031.72    2.144   281.12
2031.82    2.143   280.81
2031.92    2.143   280.50
2032.02    2.143   280.19
2032.12    2.143   279.88
2032.22    2.142   279.57
2032.32    2.142   279.26
2032.42    2.141   278.95
2032.52    2.140   278.63
2032.62    2.140   278.32
2032.72    2.139   278.01
2032.82    2.138   277.70
2032.92    2.137   277.39
2033.02    2.135   277.08
2033.12    2.134   276.76
2033.22    2.133   276.45
2033.32    2.132   276.14
2033.42    2.130   275.82
2033.52    2.128   275.51
2033.62    2.127   275.19
2033.72    2.125   274.88
2033.82    2.123   274.56
2033.92    2.121   274.25
2034.02    2.120   273.93
2034.12    2.117   273.61
2034.22    2.115   273.29
2034.32    2.113   272.97
2034.42    2.111   272.66
2034.52    2.109   272.34
2034.62    2.106   272.01
2034.72    2.104   271.69
2034.82    2.101   271.37
2034.92    2.099   271.05
2035.02    2.096   270.72
2035.12    2.094   270.40
2035.22    2.091   270.07
2035.32    2.088   269.75
2035.42    2.085   269.42
2035.52    2.082   269.09
2035.62    2.079   268.76
2035.72    2.076   268.43
2035.82    2.073   268.10
2035.92    2.070   267.77
2036.02    2.067   267.44
2036.12    2.063   267.10
2036.22    2.060   266.77
2036.32    2.057   266.43
2036.42    2.053   266.09
2036.52    2.050   265.75
2036.62    2.046   265.41
2036.72    2.043   265.07
2036.82    2.039   264.73
2036.92    2.035   264.39
2037.02    2.032   264.04
2037.12    2.028   263.70
2037.22    2.024   263.35
2037.32    2.020   263.00
2037.42    2.016   262.65
2037.52    2.013   262.30
2037.62    2.009   261.95
2037.72    2.005   261.59
2037.82    2.001   261.24
2037.92    1.996   260.88
2038.02    1.992   260.52
2038.12    1.988   260.16
2038.22    1.984   259.80
2038.32    1.980   259.44
2038.42    1.975   259.08
2038.52    1.971   258.71
2038.62    1.967   258.34
2038.72    1.963   257.97
2038.82    1.958   257.60
2038.92    1.954   257.23
2039.02    1.949   256.86
2039.12    1.945   256.48
2039.22    1.940   256.10
2039.32    1.936   255.72
2039.42    1.931   255.34
2039.52    1.927   254.96
2039.62    1.922   254.57
2039.72    1.918   254.19
2039.82    1.913   253.80
2039.92    1.908   253.41
2040.02    1.904   253.02
2040.12    1.899   252.62
2040.22    1.894   252.22
2040.32    1.889   251.83
2040.42    1.885   251.43
2040.52    1.880   251.02
2040.62    1.875   250.62
2040.72    1.870   250.21
2040.82    1.865   249.81
2040.92    1.861   249.39
2041.02    1.856   248.98
2041.12    1.851   248.57
2041.22    1.846   248.15
2041.32    1.841   247.73
2041.42    1.836   247.31
2041.52    1.832   246.89
2041.62    1.827   246.46
2041.72    1.822   246.03
2041.82    1.817   245.60
2041.92    1.812   245.17
2042.02    1.807   244.73
2042.12    1.802   244.30
2042.22    1.797   243.86
2042.32    1.792   243.41
2042.42    1.787   242.97
2042.52    1.783   242.52
2042.62    1.778   242.07
2042.72    1.773   241.62
2042.82    1.768   241.16
2042.92    1.763   240.71
2043.02    1.758   240.25
2043.12    1.753   239.78
2043.22    1.748   239.32
2043.32    1.743   238.85
2043.42    1.739   238.38
2043.52    1.734   237.91
2043.62    1.729   237.43
2043.72    1.724   236.96
2043.82    1.719   236.47
2043.92    1.714   235.99
2044.02    1.710   235.51
2044.12    1.705   235.02
2044.22    1.700   234.52
2044.32    1.695   234.03
2044.42    1.691   233.53
2044.52    1.686   233.03
2044.62    1.681   232.53
2044.72    1.676   232.02
2044.82    1.672   231.52
2044.92    1.667   231.00
2045.02    1.662   230.49
2045.12    1.658   229.97
2045.22    1.653   229.45
2045.32    1.649   228.93
2045.42    1.644   228.40
2045.52    1.640   227.88
2045.62    1.635   227.34
2045.72    1.631   226.81
2045.82    1.626   226.27
2045.92    1.622   225.73
2046.02    1.618   225.19






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 17:36:40



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