Double Star Calculator - Orbit

Orbital Elements for BU64AB
WDS: BU64AB WDS ID/Discoverer
P: 2559.040 Orbital period (years)
a: 2.677 Semi-major axis (arcseconds)
i: 75.1 Inclination (degrees)
Ω: 159.3 Longitude of ascending node (degrees)
T: 1951.410 Epoch of periastron passage (year)
e: 0.805 Eccentricity
ω: 138.6 Longitude of periastron (degrees)
Start-Year: 745.48 Year
End-Year: 3304.52 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU64AB
Position: 204500.23+124336.5 Epoch-2000 right ascension and declination
WDS-ID: 20450+1244 WDS designation
Discoverer Code: BU64AB Discover designation and components
ADS number: 14238 Aitken Double Star catalog
HD number: 197683 HD catalog number
Hipparcos number: 102398 Hipparcos catalog number
V1: 9.14 Magnitude of the primary
V2: 8.56 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2001 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: USN2007a Reference

Double Star Orbit for BU64AB



WDS 6th Orbit including measures of BU64AB

-- 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 BU64AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.632   359.65
--------------------------
745.48    3.802   147.33
755.48    3.812   147.43
765.48    3.822   147.54
775.48    3.831   147.64
785.48    3.840   147.75
795.48    3.849   147.85
805.48    3.857   147.96
815.48    3.865   148.06
825.48    3.872   148.16
835.48    3.879   148.26
845.48    3.886   148.37
855.48    3.892   148.47
865.48    3.898   148.57
875.48    3.903   148.67
885.48    3.908   148.77
895.48    3.912   148.87
905.48    3.916   148.97
915.48    3.920   149.07
925.48    3.923   149.17
935.48    3.926   149.27
945.48    3.929   149.37
955.48    3.931   149.47
965.48    3.932   149.57
975.48    3.933   149.67
985.48    3.934   149.77
995.48    3.934   149.87
1005.48    3.934   149.97
1015.48    3.934   150.07
1025.48    3.932   150.17
1035.48    3.931   150.27
1045.48    3.929   150.37
1055.48    3.926   150.47
1065.48    3.923   150.57
1075.48    3.920   150.67
1085.48    3.916   150.77
1095.48    3.911   150.87
1105.48    3.906   150.97
1115.48    3.901   151.07
1125.48    3.895   151.17
1135.48    3.889   151.27
1145.48    3.882   151.37
1155.48    3.874   151.48
1165.48    3.866   151.58
1175.48    3.857   151.68
1185.48    3.848   151.78
1195.48    3.839   151.89
1205.48    3.828   151.99
1215.48    3.818   152.10
1225.48    3.806   152.20
1235.48    3.794   152.31
1245.48    3.782   152.42
1255.48    3.769   152.53
1265.48    3.755   152.64
1275.48    3.740   152.74
1285.48    3.725   152.85
1295.48    3.710   152.97
1305.48    3.693   153.08
1315.48    3.677   153.19
1325.48    3.659   153.31
1335.48    3.641   153.42
1345.48    3.622   153.54
1355.48    3.602   153.66
1365.48    3.581   153.78
1375.48    3.560   153.90
1385.48    3.538   154.02
1395.48    3.516   154.14
1405.48    3.492   154.27
1415.48    3.468   154.39
1425.48    3.443   154.52
1435.48    3.417   154.65
1445.48    3.390   154.79
1455.48    3.363   154.92
1465.48    3.334   155.06
1475.48    3.305   155.20
1485.48    3.274   155.34
1495.48    3.243   155.48
1505.48    3.211   155.63
1515.48    3.178   155.78
1525.48    3.143   155.94
1535.48    3.108   156.09
1545.48    3.071   156.26
1555.48    3.034   156.42
1565.48    2.995   156.59
1575.48    2.955   156.76
1585.48    2.914   156.94
1595.48    2.871   157.13
1605.48    2.827   157.32
1615.48    2.782   157.51
1625.48    2.735   157.71
1635.48    2.687   157.92
1645.48    2.638   158.14
1655.48    2.586   158.36
1665.48    2.533   158.60
1675.48    2.479   158.84
1685.48    2.422   159.10
1695.48    2.364   159.37
1705.48    2.303   159.65
1715.48    2.240   159.95
1725.48    2.176   160.26
1735.48    2.108   160.60
1745.48    2.039   160.96
1755.48    1.966   161.34
1765.48    1.891   161.75
1775.48    1.813   162.20
1785.48    1.731   162.69
1795.48    1.647   163.23
1805.48    1.558   163.83
1815.48    1.465   164.51
1825.48    1.368   165.27
1835.48    1.267   166.16
1845.48    1.160   167.20
1855.48    1.048   168.47
1865.48    0.929   170.05
1875.48    0.805   172.10
1885.48    0.673   174.94
1895.48    0.535   179.20
1905.48    0.393   186.51
1915.48    0.255   201.97
1925.48    0.161   242.43
1935.48    0.204   296.24
1945.48    0.327   319.60
1955.48    0.449   330.00
1965.48    0.544   336.24
1975.48    0.607   340.86
1985.48    0.643   344.78
1995.48    0.658   348.40
2005.48    0.658   351.94
2015.48    0.649   355.53
2025.48    0.633   359.26
2035.48    0.614     3.21
2045.48    0.592     7.44
2055.48    0.570    12.00
2065.48    0.549    16.92
2075.48    0.529    22.22
2085.48    0.513    27.89
2095.48    0.500    33.90
2105.48    0.491    40.17
2115.48    0.488    46.59
2125.48    0.489    53.05
2135.48    0.496    59.39
2145.48    0.508    65.51
2155.48    0.524    71.29
2165.48    0.545    76.67
2175.48    0.570    81.63
2185.48    0.598    86.15
2195.48    0.628    90.25
2205.48    0.661    93.96
2215.48    0.696    97.30
2225.48    0.732   100.32
2235.48    0.770   103.05
2245.48    0.808   105.52
2255.48    0.848   107.77
2265.48    0.888   109.81
2275.48    0.929   111.68
2285.48    0.970   113.38
2295.48    1.011   114.95
2305.48    1.053   116.40
2315.48    1.094   117.73
2325.48    1.136   118.97
2335.48    1.177   120.12
2345.48    1.219   121.19
2355.48    1.261   122.19
2365.48    1.302   123.13
2375.48    1.343   124.01
2385.48    1.384   124.84
2395.48    1.425   125.62
2405.48    1.466   126.35
2415.48    1.506   127.05
2425.48    1.546   127.71
2435.48    1.586   128.34
2445.48    1.626   128.93
2455.48    1.666   129.50
2465.48    1.705   130.04
2475.48    1.744   130.56
2485.48    1.782   131.05
2495.48    1.820   131.53
2505.48    1.858   131.98
2515.48    1.896   132.42
2525.48    1.933   132.84
2535.48    1.970   133.24
2545.48    2.007   133.63
2555.48    2.043   134.01
2565.48    2.079   134.37
2575.48    2.115   134.72
2585.48    2.150   135.06
2595.48    2.185   135.38
2605.48    2.220   135.70
2615.48    2.254   136.01
2625.48    2.289   136.31
2635.48    2.322   136.60
2645.48    2.356   136.88
2655.48    2.389   137.15
2665.48    2.421   137.42
2675.48    2.454   137.67
2685.48    2.486   137.93
2695.48    2.518   138.17
2705.48    2.549   138.41
2715.48    2.580   138.65
2725.48    2.611   138.87
2735.48    2.641   139.10
2745.48    2.671   139.32
2755.48    2.701   139.53
2765.48    2.730   139.74
2775.48    2.759   139.94
2785.48    2.788   140.14
2795.48    2.816   140.34
2805.48    2.844   140.53
2815.48    2.872   140.72
2825.48    2.899   140.90
2835.48    2.926   141.08
2845.48    2.952   141.26
2855.48    2.979   141.44
2865.48    3.005   141.61
2875.48    3.030   141.78
2885.48    3.056   141.94
2895.48    3.081   142.11
2905.48    3.105   142.27
2915.48    3.129   142.43
2925.48    3.153   142.58
2935.48    3.177   142.74
2945.48    3.200   142.89
2955.48    3.223   143.04
2965.48    3.245   143.18
2975.48    3.268   143.33
2985.48    3.290   143.47
2995.48    3.311   143.61
3005.48    3.332   143.75
3015.48    3.353   143.89
3025.48    3.374   144.02
3035.48    3.394   144.16
3045.48    3.413   144.29
3055.48    3.433   144.42
3065.48    3.452   144.55
3075.48    3.471   144.68
3085.48    3.489   144.81
3095.48    3.507   144.93
3105.48    3.525   145.06
3115.48    3.542   145.18
3125.48    3.559   145.30
3135.48    3.576   145.42
3145.48    3.592   145.54
3155.48    3.608   145.66
3165.48    3.624   145.78
3175.48    3.639   145.90
3185.48    3.654   146.01
3195.48    3.668   146.13
3205.48    3.682   146.24
3215.48    3.696   146.35
3225.48    3.709   146.47
3235.48    3.722   146.58
3245.48    3.735   146.69
3255.48    3.747   146.80
3265.48    3.759   146.91
3275.48    3.771   147.02
3285.48    3.782   147.12
3295.48    3.793   147.23






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 18:18:26



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