Double Star Calculator - Orbit

Orbital Elements for BU603AB
WDS: BU603AB WDS ID/Discoverer
P: 133.120 Orbital period (years)
a: 0.685 Semi-major axis (arcseconds)
i: 147.4 Inclination (degrees)
Ω: 255.1 Longitude of ascending node (degrees)
T: 1938.510 Epoch of periastron passage (year)
e: 0.788 Eccentricity
ω: 96.3 Longitude of periastron (degrees)
Start-Year: 1958.44 Year
End-Year: 2091.56 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for BU603AB
Position: 114838.71+141703.2 Epoch-2000 right ascension and declination
WDS-ID: 11486+1417 WDS designation
Discoverer Code: BU603AB Discover designation and components
ADS number: 8311 Aitken Double Star catalog
HD number: 102590 HD catalog number
Hipparcos number: 57606 Hipparcos catalog number
V1: 5.97 Magnitude of the primary
V2: 8.53 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 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: Tok2023a Reference

Double Star Orbit for BU603AB



WDS 6th Orbit including measures of BU603AB

-- 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 BU603AB
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.976   323.98
--------------------------
1958.44    0.671    15.97
1959.44    0.688    14.54
1960.44    0.704    13.18
1961.44    0.720    11.88
1962.44    0.736    10.64
1963.44    0.750     9.45
1964.44    0.765     8.30
1965.44    0.779     7.20
1966.44    0.792     6.13
1967.44    0.805     5.10
1968.44    0.817     4.10
1969.44    0.829     3.13
1970.44    0.841     2.18
1971.44    0.852     1.27
1972.44    0.863     0.37
1973.44    0.873   359.50
1974.44    0.883   358.64
1975.44    0.893   357.81
1976.44    0.902   356.99
1977.44    0.911   356.19
1978.44    0.920   355.41
1979.44    0.928   354.64
1980.44    0.936   353.88
1981.44    0.944   353.14
1982.44    0.951   352.40
1983.44    0.958   351.68
1984.44    0.965   350.97
1985.44    0.971   350.26
1986.44    0.977   349.57
1987.44    0.982   348.88
1988.44    0.988   348.21
1989.44    0.993   347.54
1990.44    0.998   346.87
1991.44    1.002   346.21
1992.44    1.006   345.56
1993.44    1.010   344.91
1994.44    1.014   344.27
1995.44    1.017   343.63
1996.44    1.020   343.00
1997.44    1.023   342.37
1998.44    1.025   341.74
1999.44    1.028   341.12
2000.44    1.029   340.49
2001.44    1.031   339.87
2002.44    1.032   339.25
2003.44    1.033   338.64
2004.44    1.034   338.02
2005.44    1.034   337.41
2006.44    1.035   336.79
2007.44    1.035   336.18
2008.44    1.034   335.56
2009.44    1.033   334.95
2010.44    1.032   334.33
2011.44    1.031   333.71
2012.44    1.030   333.09
2013.44    1.028   332.47
2014.44    1.026   331.84
2015.44    1.023   331.22
2016.44    1.021   330.59
2017.44    1.018   329.95
2018.44    1.014   329.32
2019.44    1.011   328.67
2020.44    1.007   328.03
2021.44    1.002   327.38
2022.44    0.998   326.72
2023.44    0.993   326.05
2024.44    0.988   325.38
2025.44    0.982   324.70
2026.44    0.976   324.02
2027.44    0.970   323.32
2028.44    0.964   322.62
2029.44    0.957   321.91
2030.44    0.950   321.18
2031.44    0.942   320.45
2032.44    0.934   319.70
2033.44    0.926   318.94
2034.44    0.917   318.16
2035.44    0.908   317.37
2036.44    0.899   316.57
2037.44    0.889   315.74
2038.44    0.878   314.90
2039.44    0.868   314.04
2040.44    0.857   313.15
2041.44    0.845   312.24
2042.44    0.833   311.31
2043.44    0.820   310.34
2044.44    0.807   309.35
2045.44    0.794   308.32
2046.44    0.780   307.26
2047.44    0.765   306.15
2048.44    0.750   305.01
2049.44    0.734   303.81
2050.44    0.717   302.56
2051.44    0.700   301.25
2052.44    0.682   299.87
2053.44    0.664   298.42
2054.44    0.644   296.88
2055.44    0.624   295.24
2056.44    0.603   293.49
2057.44    0.581   291.61
2058.44    0.557   289.58
2059.44    0.533   287.36
2060.44    0.507   284.93
2061.44    0.480   282.23
2062.44    0.452   279.20
2063.44    0.421   275.74
2064.44    0.389   271.72
2065.44    0.354   266.95
2066.44    0.317   261.10
2067.44    0.277   253.61
2068.44    0.234   243.45
2069.44    0.188   228.50
2070.44    0.146   204.31
2071.44    0.123   165.96
2072.44    0.138   125.17
2073.44    0.177    97.85
2074.44    0.220    80.90
2075.44    0.261    69.43
2076.44    0.299    60.99
2077.44    0.334    54.40
2078.44    0.367    49.03
2079.44    0.398    44.52
2080.44    0.427    40.65
2081.44    0.454    37.25
2082.44    0.480    34.23
2083.44    0.505    31.51
2084.44    0.528    29.04
2085.44    0.551    26.78
2086.44    0.573    24.70
2087.44    0.593    22.76
2088.44    0.613    20.95
2089.44    0.632    19.25
2090.44    0.651    17.65
2091.44    0.669    16.14



 

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 16:41:36


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