Double Star Calculator - Orbit

Orbital Elements for BU119AB

WDS:	BU119AB	WDS ID/Discoverer
P:	1348.400	Orbital period (years)
a:	3.23	Semi-major axis (arcseconds)
i:	110.7	Inclination (degrees)
Ω:	237.0	Longitude of ascending node (degrees)
T:	1361.400	Epoch of periastron passage (year)
e:	0.35	Eccentricity
ω:	117.5	Longitude of periastron (degrees)
Start-Year:	1350.8	Year
End-Year:	2699.2	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU119AB
Position:	150531.91-070048.8	Epoch-2000 right ascension and declination
WDS-ID:	15055-0701	WDS designation
Discoverer Code:	BU119AB	Discover designation and components
ADS number:	9497	Aitken Double Star catalog
HD number:	133584	HD catalog number
Hipparcos number:	73846	Hipparcos catalog number
V1:	8.09	Magnitude of the primary
V2:	8.76	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		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:	Kiy2017	Reference

Double Star Orbit for BU119AB

WDS 6th Orbit including measures of BU119AB

-- 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 BU119AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.373   272.63
--------------------------
1350.80    1.030    99.30
1360.80    1.163    91.58
1370.80    1.305    85.50
1380.80    1.448    80.62
1390.80    1.588    76.61
1400.80    1.723    73.25
1410.80    1.850    70.35
1420.80    1.968    67.82
1430.80    2.076    65.57
1440.80    2.173    63.52
1450.80    2.259    61.65
1460.80    2.333    59.90
1470.80    2.397    58.25
1480.80    2.450    56.68
1490.80    2.493    55.17
1500.80    2.525    53.71
1510.80    2.548    52.27
1520.80    2.563    50.86
1530.80    2.568    49.46
1540.80    2.566    48.06
1550.80    2.557    46.66
1560.80    2.541    45.24
1570.80    2.519    43.80
1580.80    2.491    42.33
1590.80    2.458    40.83
1600.80    2.421    39.28
1610.80    2.380    37.68
1620.80    2.334    36.02
1630.80    2.286    34.29
1640.80    2.236    32.48
1650.80    2.183    30.59
1660.80    2.128    28.61
1670.80    2.072    26.52
1680.80    2.016    24.31
1690.80    1.959    21.97
1700.80    1.903    19.50
1710.80    1.847    16.87
1720.80    1.793    14.09
1730.80    1.740    11.13
1740.80    1.690     7.99
1750.80    1.643     4.67
1760.80    1.600     1.16
1770.80    1.561   357.47
1780.80    1.527   353.60
1790.80    1.498   349.57
1800.80    1.476   345.39
1810.80    1.459   341.11
1820.80    1.450   336.75
1830.80    1.447   332.34
1840.80    1.451   327.95
1850.80    1.462   323.60
1860.80    1.480   319.33
1870.80    1.504   315.19
1880.80    1.535   311.19
1890.80    1.571   307.37
1900.80    1.612   303.72
1910.80    1.658   300.27
1920.80    1.708   297.01
1930.80    1.762   293.95
1940.80    1.818   291.07
1950.80    1.878   288.37
1960.80    1.939   285.83
1970.80    2.003   283.46
1980.80    2.067   281.23
1990.80    2.133   279.14
2000.80    2.200   277.17
2010.80    2.267   275.32
2020.80    2.334   273.58
2030.80    2.402   271.93
2040.80    2.469   270.38
2050.80    2.535   268.91
2060.80    2.601   267.51
2070.80    2.666   266.18
2080.80    2.730   264.91
2090.80    2.793   263.70
2100.80    2.855   262.54
2110.80    2.915   261.44
2120.80    2.974   260.37
2130.80    3.031   259.35
2140.80    3.086   258.36
2150.80    3.139   257.41
2160.80    3.190   256.49
2170.80    3.238   255.60
2180.80    3.285   254.73
2190.80    3.328   253.89
2200.80    3.370   253.06
2210.80    3.408   252.26
2220.80    3.444   251.48
2230.80    3.477   250.71
2240.80    3.507   249.95
2250.80    3.533   249.20
2260.80    3.556   248.47
2270.80    3.576   247.75
2280.80    3.592   247.03
2290.80    3.605   246.32
2300.80    3.614   245.61
2310.80    3.618   244.90
2320.80    3.619   244.20
2330.80    3.616   243.49
2340.80    3.608   242.79
2350.80    3.595   242.08
2360.80    3.578   241.36
2370.80    3.556   240.63
2380.80    3.529   239.90
2390.80    3.497   239.15
2400.80    3.460   238.39
2410.80    3.417   237.61
2420.80    3.369   236.81
2430.80    3.315   235.98
2440.80    3.255   235.13
2450.80    3.188   234.24
2460.80    3.116   233.31
2470.80    3.037   232.34
2480.80    2.952   231.31
2490.80    2.860   230.22
2500.80    2.762   229.05
2510.80    2.657   227.80
2520.80    2.545   226.43
2530.80    2.426   224.94
2540.80    2.301   223.29
2550.80    2.170   221.44
2560.80    2.033   219.35
2570.80    1.890   216.95
2580.80    1.743   214.15
2590.80    1.593   210.83
2600.80    1.441   206.82
2610.80    1.291   201.86
2620.80    1.145   195.61
2630.80    1.010   187.63
2640.80    0.895   177.38
2650.80    0.809   164.55
2660.80    0.767   149.52
2670.80    0.775   133.83
2680.80    0.833   119.41
2690.80    0.929   107.42

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 17:12:25