Double Star Calculator - Orbit

Orbital Elements for DON91AB
WDS: DON91AB WDS ID/Discoverer
P: 43.540 Orbital period (years)
a: 1.413 Semi-major axis (arcseconds)
i: 70.2 Inclination (degrees)
Ω: 240.9 Longitude of ascending node (degrees)
T: 1996.040 Epoch of periastron passage (year)
e: 0.811 Eccentricity
ω: 277.7 Longitude of periastron (degrees)
Start-Year: 2003.23 Year
End-Year: 2046.77 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for DON91AB
Position: 050228.41-211524.2 Epoch-2000 right ascension and declination
WDS-ID: 05025-2115 WDS designation
Discoverer Code: DON91AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 32450 HD catalog number
Hipparcos number: 23452 Hipparcos catalog number
V1: 8.66 Magnitude of the primary
V2: 10.60 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2024 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: Tok2024b Reference

Double Star Orbit for DON91AB



WDS 6th Orbit including measures of DON91AB

-- 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 DON91AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.101    20.29
--------------------------
2003.23    0.801   283.21
2003.33    0.801   283.72
2003.43    0.802   284.23
2003.53    0.802   284.74
2003.63    0.802   285.25
2003.73    0.802   285.75
2003.83    0.802   286.26
2003.93    0.802   286.77
2004.03    0.802   287.28
2004.13    0.802   287.79
2004.23    0.802   288.30
2004.33    0.802   288.81
2004.43    0.802   289.32
2004.53    0.802   289.82
2004.63    0.802   290.33
2004.73    0.802   290.84
2004.83    0.801   291.35
2004.93    0.801   291.86
2005.03    0.801   292.37
2005.13    0.801   292.88
2005.23    0.801   293.39
2005.33    0.801   293.90
2005.43    0.801   294.41
2005.53    0.801   294.92
2005.63    0.801   295.43
2005.73    0.801   295.94
2005.83    0.800   296.45
2005.93    0.800   296.96
2006.03    0.800   297.47
2006.13    0.800   297.98
2006.23    0.800   298.50
2006.33    0.800   299.01
2006.43    0.800   299.52
2006.53    0.800   300.03
2006.63    0.800   300.54
2006.73    0.800   301.05
2006.83    0.800   301.56
2006.93    0.800   302.07
2007.03    0.800   302.59
2007.13    0.800   303.10
2007.23    0.800   303.61
2007.33    0.800   304.12
2007.43    0.800   304.63
2007.53    0.800   305.14
2007.63    0.800   305.65
2007.73    0.800   306.16
2007.83    0.800   306.67
2007.93    0.801   307.18
2008.03    0.801   307.70
2008.13    0.801   308.21
2008.23    0.801   308.71
2008.33    0.801   309.22
2008.43    0.802   309.73
2008.53    0.802   310.24
2008.63    0.802   310.75
2008.73    0.803   311.26
2008.83    0.803   311.77
2008.93    0.803   312.27
2009.03    0.804   312.78
2009.13    0.804   313.29
2009.23    0.805   313.79
2009.33    0.805   314.30
2009.43    0.805   314.80
2009.53    0.806   315.31
2009.63    0.806   315.81
2009.73    0.807   316.31
2009.83    0.808   316.81
2009.93    0.808   317.32
2010.03    0.809   317.82
2010.13    0.809   318.32
2010.23    0.810   318.81
2010.33    0.811   319.31
2010.43    0.811   319.81
2010.53    0.812   320.31
2010.63    0.813   320.80
2010.73    0.814   321.30
2010.83    0.815   321.79
2010.93    0.815   322.28
2011.03    0.816   322.77
2011.13    0.817   323.26
2011.23    0.818   323.75
2011.33    0.819   324.24
2011.43    0.820   324.73
2011.53    0.821   325.22
2011.63    0.822   325.70
2011.73    0.823   326.18
2011.83    0.824   326.67
2011.93    0.825   327.15
2012.03    0.826   327.63
2012.13    0.827   328.11
2012.23    0.829   328.58
2012.33    0.830   329.06
2012.43    0.831   329.53
2012.53    0.832   330.01
2012.63    0.833   330.48
2012.73    0.835   330.95
2012.83    0.836   331.42
2012.93    0.837   331.89
2013.03    0.839   332.35
2013.13    0.840   332.82
2013.23    0.841   333.28
2013.33    0.843   333.74
2013.43    0.844   334.20
2013.53    0.846   334.66
2013.63    0.847   335.11
2013.73    0.849   335.57
2013.83    0.850   336.02
2013.93    0.852   336.47
2014.03    0.853   336.93
2014.13    0.855   337.37
2014.23    0.856   337.82
2014.33    0.858   338.27
2014.43    0.860   338.71
2014.53    0.861   339.15
2014.63    0.863   339.59
2014.73    0.865   340.03
2014.83    0.866   340.47
2014.93    0.868   340.90
2015.03    0.870   341.33
2015.13    0.872   341.77
2015.23    0.874   342.19
2015.33    0.875   342.62
2015.43    0.877   343.05
2015.53    0.879   343.47
2015.63    0.881   343.90
2015.73    0.883   344.32
2015.83    0.885   344.74
2015.93    0.887   345.15
2016.03    0.888   345.57
2016.13    0.890   345.98
2016.23    0.892   346.39
2016.33    0.894   346.80
2016.43    0.896   347.21
2016.53    0.898   347.62
2016.63    0.900   348.02
2016.73    0.902   348.42
2016.83    0.904   348.83
2016.93    0.906   349.22
2017.03    0.908   349.62
2017.13    0.911   350.02
2017.23    0.913   350.41
2017.33    0.915   350.80
2017.43    0.917   351.19
2017.53    0.919   351.58
2017.63    0.921   351.97
2017.73    0.923   352.35
2017.83    0.925   352.74
2017.93    0.927   353.12
2018.03    0.930   353.50
2018.13    0.932   353.87
2018.23    0.934   354.25
2018.33    0.936   354.62
2018.43    0.938   355.00
2018.53    0.941   355.37
2018.63    0.943   355.74
2018.73    0.945   356.10
2018.83    0.947   356.47
2018.93    0.949   356.83
2019.03    0.952   357.19
2019.13    0.954   357.56
2019.23    0.956   357.91
2019.33    0.958   358.27
2019.43    0.960   358.63
2019.53    0.963   358.98
2019.63    0.965   359.33
2019.73    0.967   359.68
2019.83    0.969     0.03
2019.93    0.972     0.38
2020.03    0.974     0.73
2020.13    0.976     1.07
2020.23    0.978     1.41
2020.33    0.981     1.75
2020.43    0.983     2.09
2020.53    0.985     2.43
2020.63    0.987     2.77
2020.73    0.990     3.10
2020.83    0.992     3.43
2020.93    0.994     3.77
2021.03    0.996     4.10
2021.13    0.999     4.43
2021.23    1.001     4.75
2021.33    1.003     5.08
2021.43    1.005     5.40
2021.53    1.007     5.73
2021.63    1.010     6.05
2021.73    1.012     6.37
2021.83    1.014     6.69
2021.93    1.016     7.00
2022.03    1.018     7.32
2022.13    1.021     7.64
2022.23    1.023     7.95
2022.33    1.025     8.26
2022.43    1.027     8.57
2022.53    1.029     8.88
2022.63    1.031     9.19
2022.73    1.033     9.50
2022.83    1.036     9.80
2022.93    1.038    10.11
2023.03    1.040    10.41
2023.13    1.042    10.71
2023.23    1.044    11.01
2023.33    1.046    11.31
2023.43    1.048    11.61
2023.53    1.050    11.91
2023.63    1.052    12.20
2023.73    1.054    12.50
2023.83    1.056    12.79
2023.93    1.058    13.09
2024.03    1.060    13.38
2024.13    1.062    13.67
2024.23    1.064    13.96
2024.33    1.065    14.25
2024.43    1.067    14.54
2024.53    1.069    14.82
2024.63    1.071    15.11
2024.73    1.073    15.39
2024.83    1.075    15.68
2024.93    1.076    15.96
2025.03    1.078    16.24
2025.13    1.080    16.52
2025.23    1.082    16.80
2025.33    1.083    17.08
2025.43    1.085    17.36
2025.53    1.087    17.64
2025.63    1.088    17.91
2025.73    1.090    18.19
2025.83    1.091    18.46
2025.93    1.093    18.74
2026.03    1.094    19.01
2026.13    1.096    19.29
2026.23    1.097    19.56
2026.33    1.099    19.83
2026.43    1.100    20.10
2026.53    1.101    20.37
2026.63    1.103    20.64
2026.73    1.104    20.91
2026.83    1.105    21.18
2026.93    1.107    21.44
2027.03    1.108    21.71
2027.13    1.109    21.98
2027.23    1.110    22.24
2027.33    1.111    22.51
2027.43    1.112    22.77
2027.53    1.113    23.04
2027.63    1.114    23.30
2027.73    1.115    23.56
2027.83    1.116    23.83
2027.93    1.117    24.09
2028.03    1.118    24.35
2028.13    1.119    24.61
2028.23    1.119    24.87
2028.33    1.120    25.13
2028.43    1.121    25.40
2028.53    1.121    25.66
2028.63    1.122    25.92
2028.73    1.122    26.18
2028.83    1.123    26.44
2028.93    1.123    26.69
2029.03    1.124    26.95
2029.13    1.124    27.21
2029.23    1.124    27.47
2029.33    1.124    27.73
2029.43    1.125    27.99
2029.53    1.125    28.25
2029.63    1.125    28.51
2029.73    1.125    28.77
2029.83    1.125    29.02
2029.93    1.124    29.28
2030.03    1.124    29.54
2030.13    1.124    29.80
2030.23    1.124    30.06
2030.33    1.123    30.32
2030.43    1.123    30.58
2030.53    1.122    30.84
2030.63    1.122    31.10
2030.73    1.121    31.36
2030.83    1.120    31.62
2030.93    1.120    31.88
2031.03    1.119    32.14
2031.13    1.118    32.40
2031.23    1.117    32.66
2031.33    1.116    32.93
2031.43    1.114    33.19
2031.53    1.113    33.45
2031.63    1.112    33.72
2031.73    1.110    33.98
2031.83    1.109    34.25
2031.93    1.107    34.51
2032.03    1.105    34.78
2032.13    1.103    35.05
2032.23    1.101    35.32
2032.33    1.099    35.59
2032.43    1.097    35.86
2032.53    1.095    36.13
2032.63    1.093    36.41
2032.73    1.090    36.68
2032.83    1.088    36.96
2032.93    1.085    37.23
2033.03    1.082    37.51
2033.13    1.079    37.79
2033.23    1.076    38.08
2033.33    1.073    38.36
2033.43    1.069    38.64
2033.53    1.066    38.93
2033.63    1.062    39.22
2033.73    1.058    39.51
2033.83    1.054    39.80
2033.93    1.050    40.10
2034.03    1.046    40.40
2034.13    1.042    40.70
2034.23    1.037    41.00
2034.33    1.032    41.31
2034.43    1.027    41.61
2034.53    1.022    41.93
2034.63    1.017    42.24
2034.73    1.011    42.56
2034.83    1.005    42.88
2034.93    0.999    43.21
2035.03    0.993    43.54
2035.13    0.986    43.87
2035.23    0.980    44.21
2035.33    0.973    44.55
2035.43    0.965    44.90
2035.53    0.958    45.26
2035.63    0.950    45.61
2035.73    0.942    45.98
2035.83    0.933    46.35
2035.93    0.925    46.73
2036.03    0.915    47.12
2036.13    0.906    47.51
2036.23    0.896    47.92
2036.33    0.886    48.33
2036.43    0.875    48.75
2036.53    0.864    49.18
2036.63    0.852    49.63
2036.73    0.840    50.08
2036.83    0.827    50.56
2036.93    0.814    51.04
2037.03    0.800    51.54
2037.13    0.786    52.06
2037.23    0.771    52.60
2037.33    0.755    53.16
2037.43    0.738    53.75
2037.53    0.721    54.37
2037.63    0.703    55.01
2037.73    0.683    55.69
2037.83    0.663    56.41
2037.93    0.642    57.18
2038.03    0.619    58.01
2038.13    0.595    58.90
2038.23    0.569    59.86
2038.33    0.542    60.92
2038.43    0.513    62.10
2038.53    0.482    63.42
2038.63    0.449    64.93
2038.73    0.413    66.69
2038.83    0.375    68.79
2038.93    0.334    71.40
2039.03    0.291    74.76
2039.13    0.244    79.36
2039.23    0.196    86.18
2039.33    0.148    97.46
2039.43    0.108   118.25
2039.53    0.091   153.68
2039.63    0.110   188.17
2039.73    0.152   208.01
2039.83    0.199   218.88
2039.93    0.245   225.58
2040.03    0.289   230.19
2040.13    0.329   233.62
2040.23    0.366   236.33
2040.33    0.399   238.57
2040.43    0.429   240.47
2040.53    0.457   242.14
2040.63    0.482   243.63
2040.73    0.504   244.97
2040.83    0.525   246.21
2040.93    0.544   247.35
2041.03    0.562   248.42
2041.13    0.578   249.43
2041.23    0.593   250.39
2041.33    0.607   251.30
2041.43    0.619   252.17
2041.53    0.631   253.00
2041.63    0.642   253.81
2041.73    0.653   254.59
2041.83    0.663   255.34
2041.93    0.672   256.08
2042.03    0.680   256.80
2042.13    0.688   257.49
2042.23    0.695   258.18
2042.33    0.702   258.85
2042.43    0.709   259.51
2042.53    0.715   260.15
2042.63    0.721   260.78
2042.73    0.726   261.41
2042.83    0.731   262.03
2042.93    0.736   262.63
2043.03    0.741   263.23
2043.13    0.745   263.83
2043.23    0.749   264.41
2043.33    0.753   264.99
2043.43    0.756   265.57
2043.53    0.760   266.14
2043.63    0.763   266.70
2043.73    0.766   267.26
2043.83    0.768   267.82
2043.93    0.771   268.37
2044.03    0.773   268.92
2044.13    0.776   269.46
2044.23    0.778   270.01
2044.33    0.780   270.54
2044.43    0.782   271.08
2044.53    0.783   271.62
2044.63    0.785   272.15
2044.73    0.787   272.68
2044.83    0.788   273.20
2044.93    0.789   273.73
2045.03    0.791   274.25
2045.13    0.792   274.78
2045.23    0.793   275.30
2045.33    0.794   275.82
2045.43    0.795   276.34
2045.53    0.796   276.85
2045.63    0.796   277.37
2045.73    0.797   277.89
2045.83    0.798   278.40
2045.93    0.798   278.91
2046.03    0.799   279.43
2046.13    0.799   279.94
2046.23    0.800   280.45
2046.33    0.800   280.96
2046.43    0.800   281.47
2046.53    0.801   281.98
2046.63    0.801   282.50
2046.73    0.801   283.00






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 15:33:10



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