Double Star Calculator - Orbit

Orbital Elements for BU151AB
WDS: BU151AB WDS ID/Discoverer
P: 26.683 Orbital period (years)
a: 0.43701 Semi-major axis (arcseconds)
i: 61.323 Inclination (degrees)
Ω: 357.179 Longitude of ascending node (degrees)
T: 1962.812 Epoch of periastron passage (year)
e: 0.35595 Eccentricity
ω: 168.86 Longitude of periastron (degrees)
Start-Year: 2011.6584419427345 Year
End-Year: 2038.3415580572655 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU151AB
Position: 203732.87+143542.7 Epoch-2000 right ascension and declination
WDS-ID: 20375+1436 WDS designation
Discoverer Code: BU151AB Discover designation and components
ADS number: 14073 Aitken Double Star catalog
HD number: 196524 HD catalog number
Hipparcos number: 101769 Hipparcos catalog number
V1: 4.11 Magnitude of the primary
V2: 5.02 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2008 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: Mut2010e Reference

Double Star Orbit for BU151AB



WDS 6th Orbit including measures of BU151AB

-- 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 BU151AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.504   340.26
--------------------------
2011.66    0.245    45.04
2011.76    0.238    47.02
2011.86    0.231    49.12
2011.96    0.225    51.34
2012.06    0.218    53.70
2012.16    0.212    56.21
2012.26    0.206    58.86
2012.36    0.200    61.67
2012.46    0.195    64.64
2012.56    0.190    67.77
2012.66    0.185    71.07
2012.76    0.181    74.52
2012.86    0.177    78.12
2012.96    0.174    81.85
2013.06    0.172    85.70
2013.16    0.170    89.64
2013.26    0.169    93.65
2013.36    0.169    97.70
2013.46    0.169   101.76
2013.56    0.170   105.79
2013.66    0.171   109.77
2013.76    0.173   113.66
2013.86    0.176   117.45
2013.96    0.179   121.12
2014.06    0.183   124.65
2014.16    0.187   128.04
2014.26    0.191   131.27
2014.36    0.196   134.36
2014.46    0.201   137.30
2014.56    0.206   140.10
2014.66    0.211   142.75
2014.76    0.217   145.28
2014.86    0.222   147.69
2014.96    0.227   149.98
2015.06    0.233   152.16
2015.16    0.238   154.25
2015.26    0.243   156.25
2015.36    0.248   158.17
2015.46    0.252   160.02
2015.56    0.257   161.81
2015.66    0.261   163.53
2015.76    0.265   165.20
2015.86    0.268   166.83
2015.96    0.272   168.41
2016.06    0.274   169.96
2016.16    0.277   171.48
2016.26    0.279   172.97
2016.36    0.281   174.45
2016.46    0.282   175.91
2016.56    0.283   177.36
2016.66    0.283   178.80
2016.76    0.284   180.23
2016.86    0.283   181.67
2016.96    0.283   183.11
2017.06    0.282   184.57
2017.16    0.280   186.03
2017.26    0.279   187.51
2017.36    0.276   189.01
2017.46    0.274   190.53
2017.56    0.271   192.09
2017.66    0.269   193.67
2017.76    0.265   195.29
2017.86    0.262   196.95
2017.96    0.259   198.66
2018.06    0.255   200.41
2018.16    0.251   202.21
2018.26    0.247   204.08
2018.36    0.243   206.00
2018.46    0.239   207.99
2018.56    0.235   210.04
2018.66    0.231   212.17
2018.76    0.227   214.38
2018.86    0.223   216.66
2018.96    0.219   219.03
2019.06    0.215   221.48
2019.16    0.212   224.01
2019.26    0.209   226.63
2019.36    0.205   229.32
2019.46    0.203   232.10
2019.56    0.200   234.95
2019.66    0.198   237.86
2019.76    0.196   240.84
2019.86    0.195   243.87
2019.96    0.194   246.94
2020.06    0.193   250.03
2020.16    0.193   253.15
2020.26    0.193   256.26
2020.36    0.193   259.37
2020.46    0.194   262.44
2020.56    0.196   265.48
2020.66    0.198   268.47
2020.76    0.200   271.40
2020.86    0.202   274.27
2020.96    0.205   277.05
2021.06    0.209   279.75
2021.16    0.212   282.36
2021.26    0.216   284.88
2021.36    0.220   287.30
2021.46    0.225   289.64
2021.56    0.230   291.88
2021.66    0.234   294.02
2021.76    0.240   296.08
2021.86    0.245   298.05
2021.96    0.250   299.94
2022.06    0.256   301.74
2022.16    0.262   303.47
2022.26    0.267   305.12
2022.36    0.273   306.70
2022.46    0.279   308.21
2022.56    0.285   309.66
2022.66    0.292   311.05
2022.76    0.298   312.38
2022.86    0.304   313.66
2022.96    0.310   314.88
2023.06    0.316   316.06
2023.16    0.323   317.19
2023.26    0.329   318.28
2023.36    0.335   319.33
2023.46    0.341   320.34
2023.56    0.347   321.32
2023.66    0.354   322.26
2023.76    0.360   323.17
2023.86    0.366   324.04
2023.96    0.372   324.89
2024.06    0.378   325.71
2024.16    0.384   326.51
2024.26    0.390   327.28
2024.36    0.396   328.03
2024.46    0.402   328.76
2024.56    0.407   329.46
2024.66    0.413   330.15
2024.76    0.419   330.82
2024.86    0.424   331.47
2024.96    0.430   332.10
2025.06    0.435   332.72
2025.16    0.441   333.32
2025.26    0.446   333.91
2025.36    0.451   334.49
2025.46    0.456   335.05
2025.56    0.461   335.60
2025.66    0.466   336.13
2025.76    0.471   336.66
2025.86    0.476   337.18
2025.96    0.480   337.68
2026.06    0.485   338.18
2026.16    0.490   338.66
2026.26    0.494   339.14
2026.36    0.498   339.61
2026.46    0.503   340.07
2026.56    0.507   340.53
2026.66    0.511   340.97
2026.76    0.515   341.41
2026.86    0.519   341.85
2026.96    0.522   342.27
2027.06    0.526   342.69
2027.16    0.530   343.11
2027.26    0.533   343.52
2027.36    0.536   343.92
2027.46    0.540   344.32
2027.56    0.543   344.72
2027.66    0.546   345.11
2027.76    0.549   345.49
2027.86    0.552   345.87
2027.96    0.554   346.25
2028.06    0.557   346.62
2028.16    0.560   347.00
2028.26    0.562   347.36
2028.36    0.565   347.73
2028.46    0.567   348.09
2028.56    0.569   348.45
2028.66    0.571   348.80
2028.76    0.573   349.16
2028.86    0.575   349.51
2028.96    0.576   349.85
2029.06    0.578   350.20
2029.16    0.579   350.55
2029.26    0.581   350.89
2029.36    0.582   351.23
2029.46    0.583   351.57
2029.56    0.584   351.91
2029.66    0.585   352.25
2029.76    0.586   352.59
2029.86    0.587   352.92
2029.96    0.588   353.26
2030.06    0.588   353.59
2030.16    0.588   353.92
2030.26    0.589   354.26
2030.36    0.589   354.59
2030.46    0.589   354.92
2030.56    0.589   355.26
2030.66    0.589   355.59
2030.76    0.588   355.92
2030.86    0.588   356.26
2030.96    0.588   356.59
2031.06    0.587   356.93
2031.16    0.586   357.26
2031.26    0.585   357.60
2031.36    0.584   357.94
2031.46    0.583   358.28
2031.56    0.582   358.62
2031.66    0.581   358.96
2031.76    0.579   359.30
2031.86    0.578   359.65
2031.96    0.576   359.99
2032.06    0.575     0.34
2032.16    0.573     0.69
2032.26    0.571     1.05
2032.36    0.569     1.40
2032.46    0.566     1.76
2032.56    0.564     2.12
2032.66    0.561     2.49
2032.76    0.559     2.86
2032.86    0.556     3.23
2032.96    0.553     3.60
2033.06    0.550     3.98
2033.16    0.547     4.37
2033.26    0.544     4.76
2033.36    0.541     5.15
2033.46    0.537     5.55
2033.56    0.534     5.95
2033.66    0.530     6.36
2033.76    0.526     6.77
2033.86    0.523     7.19
2033.96    0.519     7.62
2034.06    0.514     8.05
2034.16    0.510     8.49
2034.26    0.506     8.94
2034.36    0.501     9.39
2034.46    0.497     9.86
2034.56    0.492    10.33
2034.66    0.487    10.81
2034.76    0.482    11.30
2034.86    0.477    11.80
2034.96    0.472    12.32
2035.06    0.467    12.84
2035.16    0.461    13.38
2035.26    0.456    13.93
2035.36    0.450    14.49
2035.46    0.445    15.07
2035.56    0.439    15.66
2035.66    0.433    16.27
2035.76    0.427    16.90
2035.86    0.420    17.54
2035.96    0.414    18.20
2036.06    0.408    18.89
2036.16    0.401    19.59
2036.26    0.395    20.32
2036.36    0.388    21.07
2036.46    0.381    21.86
2036.56    0.375    22.66
2036.66    0.368    23.50
2036.76    0.361    24.37
2036.86    0.354    25.28
2036.96    0.347    26.22
2037.06    0.339    27.20
2037.16    0.332    28.23
2037.26    0.325    29.30
2037.36    0.317    30.42
2037.46    0.310    31.60
2037.56    0.303    32.83
2037.66    0.295    34.12
2037.76    0.288    35.48
2037.86    0.280    36.91
2037.96    0.273    38.42
2038.06    0.266    40.02
2038.16    0.258    41.70
2038.26    0.251    43.48






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 18:16:56



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