Double Star Calculator - Orbit

Orbital Elements for BU920
WDS: BU920 WDS ID/Discoverer
P: 2089.143 Orbital period (years)
a: 10.29786 Semi-major axis (arcseconds)
i: 85.768 Inclination (degrees)
Ω: 140.973 Longitude of ascending node (degrees)
T: 2138.865 Epoch of periastron passage (year)
e: 0.87556 Eccentricity
ω: 243.88 Longitude of periastron (degrees)
Start-Year: 980.4284500000001 Year
End-Year: 3069.5715499999997 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU920
Position: 121546.68-232113.9 Epoch-2000 right ascension and declination
WDS-ID: 12158-2321 WDS designation
Discoverer Code: BU920 Discover designation and components
ADS number: 8481 Aitken Double Star catalog
HD number: 106612 HD catalog number
Hipparcos number: 59801 Hipparcos catalog number
V1: 6.86 Magnitude of the primary
V2: 8.22 Magnitude of the secondary
Equinox: Equinox
Date: 2014 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for BU920



WDS 6th Orbit including measures of BU920

-- 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 BU920
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.056   308.26
--------------------------
980.43    9.323   148.61
990.43    9.266   148.68
1000.43    9.208   148.76
1010.43    9.148   148.84
1020.43    9.087   148.92
1030.43    9.025   149.00
1040.43    8.961   149.08
1050.43    8.897   149.16
1060.43    8.831   149.24
1070.43    8.764   149.33
1080.43    8.695   149.41
1090.43    8.626   149.50
1100.43    8.555   149.59
1110.43    8.484   149.68
1120.43    8.411   149.77
1130.43    8.337   149.86
1140.43    8.262   149.95
1150.43    8.186   150.05
1160.43    8.108   150.15
1170.43    8.030   150.25
1180.43    7.950   150.35
1190.43    7.870   150.46
1200.43    7.788   150.56
1210.43    7.705   150.67
1220.43    7.621   150.78
1230.43    7.537   150.89
1240.43    7.451   151.01
1250.43    7.364   151.13
1260.43    7.276   151.25
1270.43    7.187   151.38
1280.43    7.097   151.50
1290.43    7.006   151.63
1300.43    6.914   151.77
1310.43    6.821   151.91
1320.43    6.727   152.05
1330.43    6.632   152.20
1340.43    6.536   152.35
1350.43    6.440   152.50
1360.43    6.342   152.66
1370.43    6.243   152.82
1380.43    6.143   152.99
1390.43    6.043   153.17
1400.43    5.941   153.35
1410.43    5.839   153.54
1420.43    5.736   153.73
1430.43    5.632   153.93
1440.43    5.527   154.14
1450.43    5.421   154.36
1460.43    5.314   154.59
1470.43    5.206   154.82
1480.43    5.098   155.07
1490.43    4.988   155.33
1500.43    4.878   155.59
1510.43    4.767   155.87
1520.43    4.655   156.17
1530.43    4.543   156.47
1540.43    4.429   156.80
1550.43    4.315   157.14
1560.43    4.200   157.50
1570.43    4.085   157.88
1580.43    3.969   158.28
1590.43    3.852   158.71
1600.43    3.734   159.16
1610.43    3.616   159.64
1620.43    3.497   160.16
1630.43    3.378   160.71
1640.43    3.258   161.30
1650.43    3.138   161.94
1660.43    3.017   162.63
1670.43    2.896   163.37
1680.43    2.774   164.18
1690.43    2.653   165.07
1700.43    2.531   166.04
1710.43    2.409   167.11
1720.43    2.288   168.29
1730.43    2.167   169.60
1740.43    2.046   171.07
1750.43    1.926   172.73
1760.43    1.807   174.60
1770.43    1.690   176.73
1780.43    1.575   179.18
1790.43    1.462   182.01
1800.43    1.353   185.30
1810.43    1.249   189.16
1820.43    1.150   193.71
1830.43    1.060   199.06
1840.43    0.979   205.35
1850.43    0.913   212.66
1860.43    0.862   220.97
1870.43    0.831   230.10
1880.43    0.822   239.68
1890.43    0.835   249.20
1900.43    0.870   258.20
1910.43    0.924   266.33
1920.43    0.993   273.45
1930.43    1.074   279.57
1940.43    1.165   284.78
1950.43    1.263   289.21
1960.43    1.365   292.99
1970.43    1.470   296.24
1980.43    1.577   299.05
1990.43    1.685   301.50
2000.43    1.791   303.66
2010.43    1.896   305.58
2020.43    1.997   307.30
2030.43    2.093   308.86
2040.43    2.182   310.28
2050.43    2.262   311.60
2060.43    2.329   312.84
2070.43    2.379   314.01
2080.43    2.404   315.15
2090.43    2.395   316.28
2100.43    2.334   317.44
2110.43    2.190   318.70
2120.43    1.901   320.24
2130.43    1.345   322.70
2140.43    0.403   333.96
2150.43    0.739   132.92
2160.43    1.709   137.94
2170.43    2.502   139.45
2180.43    3.164   140.27
2190.43    3.731   140.82
2200.43    4.226   141.23
2210.43    4.666   141.56
2220.43    5.061   141.83
2230.43    5.421   142.07
2240.43    5.749   142.28
2250.43    6.052   142.47
2260.43    6.332   142.64
2270.43    6.592   142.79
2280.43    6.835   142.94
2290.43    7.062   143.07
2300.43    7.274   143.20
2310.43    7.474   143.32
2320.43    7.662   143.43
2330.43    7.839   143.54
2340.43    8.006   143.65
2350.43    8.163   143.74
2360.43    8.312   143.84
2370.43    8.453   143.93
2380.43    8.586   144.02
2390.43    8.712   144.11
2400.43    8.832   144.20
2410.43    8.945   144.28
2420.43    9.051   144.36
2430.43    9.153   144.44
2440.43    9.248   144.51
2450.43    9.339   144.59
2460.43    9.424   144.66
2470.43    9.505   144.74
2480.43    9.581   144.81
2490.43    9.653   144.88
2500.43    9.720   144.95
2510.43    9.784   145.02
2520.43    9.844   145.08
2530.43    9.899   145.15
2540.43    9.952   145.22
2550.43   10.000   145.28
2560.43   10.046   145.35
2570.43   10.088   145.41
2580.43   10.126   145.47
2590.43   10.162   145.54
2600.43   10.195   145.60
2610.43   10.225   145.66
2620.43   10.251   145.73
2630.43   10.276   145.79
2640.43   10.297   145.85
2650.43   10.316   145.91
2660.43   10.332   145.97
2670.43   10.346   146.03
2680.43   10.357   146.09
2690.43   10.366   146.15
2700.43   10.373   146.21
2710.43   10.377   146.27
2720.43   10.379   146.34
2730.43   10.379   146.40
2740.43   10.377   146.46
2750.43   10.373   146.52
2760.43   10.367   146.58
2770.43   10.358   146.64
2780.43   10.348   146.70
2790.43   10.336   146.76
2800.43   10.321   146.82
2810.43   10.305   146.88
2820.43   10.288   146.94
2830.43   10.268   147.01
2840.43   10.246   147.07
2850.43   10.223   147.13
2860.43   10.198   147.19
2870.43   10.172   147.25
2880.43   10.143   147.32
2890.43   10.113   147.38
2900.43   10.082   147.45
2910.43   10.049   147.51
2920.43   10.014   147.57
2930.43    9.978   147.64
2940.43    9.940   147.71
2950.43    9.901   147.77
2960.43    9.860   147.84
2970.43    9.818   147.91
2980.43    9.774   147.97
2990.43    9.729   148.04
3000.43    9.682   148.11
3010.43    9.634   148.18
3020.43    9.585   148.25
3030.43    9.534   148.32
3040.43    9.482   148.39
3050.43    9.429   148.47
3060.43    9.374   148.54






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 16:44:49



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